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Financial Information by Geographic Area Data | 3 Months Ended
--- | ---
Sep. 30, 2011
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 September 30, 2011 |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 656,095 |  |  | $ | 47,086 |  |  | $ | 703,181 |
Depreciation and amortization, net of (gains) losses on disposals |  |  | 48,689 |  |  |  | 2,050 |  |  |  | 50,739 |
Interest expense |  |  | 22,802 |  |  |  | 161 |  |  |  | 22,963 |
Pretax earnings |  |  | 152,021 |  |  |  | 9,449 |  |  |  | 161,470 |
Income tax expense |  |  | 57,681 |  |  |  | 2,778 |  |  |  | 60,459 |
Identifiable assets |  |  | 4,269,467 |  |  |  | 133,670 |  |  |  | 4,403,137 |
Quarter ended September 30, 2010 |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 596,037 |  |  | $ | 40,939 |  |  | $ | 636,976 |
Depreciation and amortization, net of (gains) losses on disposals |  |  | 44,037 |  |  |  | 1,996 |  |  |  | 46,033 |
Interest expense |  |  | 21,601 |  |  |  | 187 |  |  |  | 21,788 |
Pretax earnings |  |  | 129,062 |  |  |  | 7,271 |  |  |  | 136,333 |
Income tax expense |  |  | 48,972 |  |  |  | 2,142 |  |  |  | 51,114 |
Identifiable assets |  |  | 3,804,861 |  |  |  | 134,539 |  |  |  | 3,939,400 |
|  | United States |  |  | Canada |  |  | Consolidated |
|  | (Unaudited) |
|  | (All amounts are in thousands of U.S. $'s) |
Six months ended September 30, 2011 |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 1,257,186 |  |  | $ | 88,960 |  |  | $ | 1,346,146 |
Depreciation and amortization, net of (gains) losses on disposals |  |  | 95,553 |  |  |  | 3,919 |  |  |  | 99,472 |
Interest expense |  |  | 45,272 |  |  |  | 324 |  |  |  | 45,596 |
Pretax earnings |  |  | 270,378 |  |  |  | 16,822 |  |  |  | 287,200 |
Income tax expense |  |  | 103,010 |  |  |  | 4,956 |  |  |  | 107,966 |
Identifiable assets |  |  | 4,269,467 |  |  |  | 133,670 |  |  |  | 4,403,137 |
Six months ended September 30, 2010 |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 1,145,820 |  |  | $ | 77,103 |  |  | $ | 1,222,923 |
Depreciation and amortization, net of (gains) losses on disposals |  |  | 89,074 |  |  |  | 3,741 |  |  |  | 92,815 |
Interest expense |  |  | 42,911 |  |  |  | 341 |  |  |  | 43,252 |
Pretax earnings |  |  | 228,944 |  |  |  | 14,034 |  |  |  | 242,978 |
Income tax expense |  |  | 87,123 |  |  |  | 4,134 |  |  |  | 91,257 |
Identifiable assets |  |  | 3,804,861 |  |  |  | 134,539 |  |  |  | 3,939,400 |

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