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Industry Segment and Geographic Area Data | 3 Months Ended
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Jun. 30, 2017
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, 2017 |  |  |  |  |  |
Total revenues | $ | 913,114 | $ | 44,811 | $ | 957,925
Depreciation and amortization, net of (gains) losses on disposal |  | 131,499 |  | 1,504 |  | 133,003
Interest expense |  | 29,643 |  | 702 |  | 30,345
Pretax earnings |  | 191,973 |  | 6,713 |  | 198,686
Income tax expense |  | 70,610 |  | 1,869 |  | 72,479
Identifiable assets |  | 9,390,397 |  | 410,743 |  | 9,801,140
|  | United States |  | Canada |  | Consolidated
|  | (Unaudited)
|  | (All amounts are in thousands U.S. $'s)
Quarter Ended June 30, 2016 |  |  |  |  |  |
Total revenues | $ | 880,729 | $ | 42,462 | $ | 923,191
Depreciation and amortization, net of (gains) losses on disposal |  | 102,000 |  | 1,323 |  | 103,323
Interest expense |  | 26,426 |  | – |  | 26,426
Pretax earnings |  | 224,913 |  | 8,218 |  | 233,131
Income tax expense |  | 83,745 |  | 2,213 |  | 85,958
Identifiable assets |  | 8,269,109 |  | 274,700 |  | 8,543,809

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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=68060357&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=63488584&loc=d3e20235-122688 + Details
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