General - Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Cash Flows [Abstract]
Net earnings	$ 55,794	$ 52,789
Depreciation expense	287,170	266,278
Deferred income tax expense	29,319	26,646
Accrued expenses and other non-current liabilities	(36,605)	(21,577)
Net cash provided by operating activities from continuing operations	365,009	283,845
Debt repaid, including capital and financing lease obligations	(312,400)	(463,536)
Net cash provided by financing activities from continuing operations	$ 63,505	178,870
As Previously Reported [Member]
Statement of Cash Flows [Abstract]
Net earnings		52,900
Depreciation expense		262,400
Deferred income tax expense		26,700
Accrued expenses and other non-current liabilities		(21,500)
Net cash provided by operating activities from continuing operations		277,900
Debt repaid, including capital and financing lease obligations		(457,600)
Net cash provided by financing activities from continuing operations		184,800
Adjustment [Member]
Statement of Cash Flows [Abstract]
Net earnings		(100)
Depreciation expense		3,900
Deferred income tax expense		(100)
Accrued expenses and other non-current liabilities		(100)
Net cash provided by operating activities from continuing operations		6,000
Debt repaid, including capital and financing lease obligations		(6,000)
Net cash provided by financing activities from continuing operations		$ (6,000)