Industry Segment and Geographic Area Data (Table Text Block)	3 Months Ended
Jun. 30, 2021
Geographic Areas, Long-Lived Assets [Abstract]
Industry Segment and Geographic Area Data	United States Canada Consolidated (Unaudited) (All amounts are in thousands of U.S. $'s) Quarter Ended June 30, 2021 Total revenues $ 1,396,361 $ 76,495 $ 1,472,856 Depreciation and amortization, net of gains on disposal 127,650 (1,540) 126,110 Interest expense 38,128 1,050 39,178 Pretax earnings 437,949 16,801 454,750 Income tax expense 105,302 4,273 109,575 Identifiable assets 14,661,722 453,160 15,114,882 Quarter Ended June 30, 2020 Total revenues $ 942,803 $ 44,434 $ 987,237 Depreciation and amortization, net of gains on disposal 168,526 3,777 172,303 Interest expense 38,654 867 39,521 Pretax earnings 111,949 2,369 114,318 Income tax expense 25,783 809 26,592 Identifiable assets 13,279,882 432,477 13,712,359

Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

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Period Type:	duration