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Financial Information by Geographic Area Data | 9 Months Ended
--- | ---
Dec. 31, 2012
Segments, Geographical Areas [Abstract] |
12. Industry Segment and Geographic Area Data | 12. Industry Segment and Geographic Area Data
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Quarter ended December 31, 2012 |  |  |  |  |  |
Total revenues | $ | 545,935 | $ | 32,876 | $ | 578,811
Depreciation and amortization, net of (gains) losses on disposals |  | 63,801 |  | 1,989 |  | 65,790
Interest expense |  | 21,926 |  | 150 |  | 22,076
Pretax earnings |  | 58,669 |  | 1,201 |  | 59,870
Income tax expense |  | 22,706 |  | 318 |  | 23,024
Identifiable assets |  | 5,077,479 |  | 141,826 |  | 5,219,305
Quarter ended December 31, 2011 |  |  |  |  |  |
Total revenues | $ | 600,609 | $ | 32,480 | $ | 633,089
Depreciation and amortization, net of (gains) losses on disposals |  | 57,983 |  | 1,957 |  | 59,940
Interest expense |  | 22,579 |  | 165 |  | 22,744
Pretax earnings (loss) |  | (2,567 | ) | 4,696 |  | 2,129
Income tax expense |  | 17 |  | 1,384 |  | 1,401
Identifiable assets |  | 4,499,251 |  | 134,751 |  | 4,634,002
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands of U.S. $'s)
Nine months ended December 31, 2012 |  |  |  |  |  |
Total revenues | $ | 1,862,680 | $ | 122,864 | $ | 1,985,544
Depreciation and amortization, net of (gains) losses on disposals |  | 180,736 |  | 6,032 |  | 186,768
Interest expense |  | 67,226 |  | 454 |  | 67,680
Pretax earnings |  | 340,746 |  | 18,721 |  | 359,467
Income tax expense |  | 127,671 |  | 4,961 |  | 132,632
Identifiable assets |  | 5,077,479 |  | 141,826 |  | 5,219,305
Nine months ended December 31, 2011 |  |  |  |  |  |
Total revenues | $ | 1,857,795 | $ | 121,440 | $ | 1,979,235
Depreciation and amortization, net of (gains) losses on disposals |  | 153,536 |  | 5,876 |  | 159,412
Interest expense |  | 67,851 |  | 489 |  | 68,340
Pretax earnings |  | 267,811 |  | 21,518 |  | 289,329
Income tax expense |  | 103,027 |  | 6,340 |  | 109,367
Identifiable assets |  | 4,499,251 |  | 134,751 |  | 4,634,002

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