Industry Segment and Geographic Area Data (Table Text Block)

3 Months Ended

Jun. 30, 2018

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, 2018
Total revenues	$	971,295	$	48,282	$	1,019,577
Depreciation and amortization, net of (gains) losses on disposal		131,379		1,079		132,458
Interest expense		34,549		705		35,254
Pretax earnings		163,262		5,935		169,197
Income tax expense		39,777		1,571		41,348
Identifiable assets		10,657,222		344,262		11,001,484
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