Greggg Piontek
Analyst · Neal Dingmann with SunTrust
Thank you, Bruce, and good morning, everyone. Let me begin by discussing our Mats & Integrated Services and Environmental Services segment, then wrap up with a discussion of our consolidated results.
The Mats business reported $29.4 million in revenues for the fourth quarter, a 3% sequential decrease but a 43% increase year-over-year. As Paul mentioned, we did complete the redeployment of our mats from the northeast region to meet customer demands in other areas, including the Gulf Coast and the Rockies. While rental revenues were down in the quarter due to this transition, the fourth quarter benefited from a large site preparation project in the Gulf Coast.
As a result, total rental and service revenue increased 9% over the previous quarter. Composite Mat sales contributed $11.6 million of revenues to the fourth quarter, down $2.3 million from the record level of sales in the third quarter. For the full-year 2011, Composite Mat sales were $42 million, reflecting a record level.
The Mats segment had operating income of $11.7 million in the fourth quarter, down 20% from the third quarter operating income of $14.5 million and up 13% from the $10.3 million earned a year ago. As we stated in the third quarter call, we expected some margin compression due to lower utilization during this transition period, increased transportation costs associated with the move and the lower rental rates in the new deployment areas. Operating margin in the fourth quarter was 39.7%. This compares to 48.1% operating margin in the third quarter and a 50.2% operating margin in the fourth quarter last year.
Now moving on to the Environmental Services business. Revenues of $13 million were down 12% from the previous quarter and up 17% from a year ago. As Paul mentioned, the third quarter benefited from large disposal projects, which contributed $2.2 million of revenues in that period. Operating income in the Environmental Services segment was $2.4 million, compared to $5 million in the third quarter and $2.6 million in the same quarter a year ago.
Our fourth quarter operating margin was 18.1%, down from the 33.4% margin we achieved in the third quarter and the 23.4% margin achieved a year ago. The fourth quarter included a $700,000 non-cash impairment charge for the write-off of one of our disposal wells, which we plugged and abandoned during the quarter.
Now moving on to our consolidated results. For the fourth quarter of 2011, we reported total revenues of $264 million, an increase of 1% from the third quarter and up 35% from a year ago. Operating income was $34 million, down 13% sequentially and up more than 37% from the fourth quarter of last year. The sequential decline in operating income is partially attributable to a $1.6 million increase in spending for supplemental resources, employee training and IT system support costs, following an October 2011 ERP system conversion in our U.S. operations, along with the $700,000 increase in employee healthcare costs, which impacted all of our operating segments in the fourth quarter.
As we continue to fine-tune our business processes and provide supplemental user training on this new ERP system, we expect an elevated level of system support costs that continue through the first quarter of 2012.
Net income in the quarter was $21.9 million or $0.22 per diluted share as compared to $23 million or $0.23 per diluted share in the third quarter of 2011. For the fourth quarter, our tax rate was 30.4%, compared with 36.5% in the third quarter. The lower tax rate was driven by benefits from the strong Canadian results, along with certain U.S. tax deductions now allowable, as we become a cash taxpayer in 2011.
For the full-year 2011, we reported revenues of $958 million, which was up 34% from 2010. Operating income in 2011 was $133 million, a new record that topped last year's $78 million. This $55 million improvement in operating income was achieved on a year-over-year revenue improvement of $242 million for an incremental margin of 23%. Net income for 2011 was $80 million or $0.80 per diluted share, compared to $41.6 million or $0.46 per diluted share in 2010. Our tax rate for the full-year 2011 was 35%.
Now let me discuss our balance sheet and liquidity position. Total debt at December 31, 2011, was $192 million, resulting in a debt-to-total capitalization ratio of 27.8%. We ended 2011 with a cash balance of $25 million versus $63 million at the end of the third quarter. In addition, we ended the year with $17 million drawn on our revolving credit facility. The drawdown of cash and borrowing on our revolving credit facility was required in part to fund a $40 million increase in receivables, following our ERP system conversion. Due to the inherent process, reengineering, work force training, and early implementation inefficiencies that are typically encountered in an ERP conversion, our customer invoicing lagged revenue levels for much of the fourth quarter, causing DSOs in this business unit to increase by approximately 30 days. Over this period, we have continued to take corrective actions to accelerate our invoicing processes and have now been invoicing at a pace that is well in excess of revenue levels through the first 6 weeks of 2012. However, while significant progress is being made, we expect that DSOs will not return to our recent historical level until the second or third quarter of 2012.
Our fourth quarter capital expenditures totaled $8.8 million and our depreciation and amortization expense was $7.8 million. For fiscal 2012, we expect our capital expenditures to be in the $50 million to $60 million range, which includes the cost of the technology complex that Bruce described earlier, as well as planned investments in facilities and equipment and the expansion of our mats rental fleet. Finally, we expect our tax rate for the full-year 2012 to be between 35% to 37%.
Now, I'd like to turn the call back over to Paul for his concluding remarks.