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Industry Segment and Geographic Area Data | 3 Months Ended
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Jun. 30, 2015
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 U.S. $'s)
Quarter Ended June 30, 2015 |  |  |  |  |  |
Total revenues | $ | 841,463 | $ | 43,342 | $ | 884,805
Depreciation and amortization, net of (gains) losses on disposal |  | 56,739 |  | (979) |  | 55,760
Interest expense |  | 21,989 |  | 111 |  | 22,100
Pretax earnings |  | 259,127 |  | 9,881 |  | 269,008
Income tax expense |  | 95,095 |  | 2,628 |  | 97,723
Identifiable assets |  | 6,874,093 |  | 216,541 |  | 7,090,634
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands U.S. $'s)
Quarter En ded June 30, 2014 |  |  |  |  |  |
Total revenues | $ | 773,043 | $ | 45,912 | $ | 818,955
Depreciation and amortization, net of (gains) losses on disposal |  | 64,040 |  | 1,195 |  | 65,235
Interest expense |  | 24,019 |  | 129 |  | 24,148
Pretax earnings |  | 186,907 |  | 8,144 |  | 195,051
Income tax expense |  | 68,419 |  | 2,158 |  | 70,577
Identifiable assets |  | 6,358,303 |  | 170,379 |  | 6,528,682

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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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