CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income	$ 684,948	$ 584,252
Adjustments:
Depreciation and amortization	493,606	470,686
Impairment losses	33,651	0
Net deferred income tax (benefit) expense	(893)	1,084
Gain (loss) on derivative instruments not designated as hedges	29,750	(34,988)
Share-based compensation expense	31,819	35,379
Equity investment income	(73,063)	(35,239)
Amortization of debt issuance costs	16,283	26,035
Gain on sale of property and equipment	0	(30,902)
Gain on sale of unconsolidated affiliate	(13,680)	0
Recognition of deferred gain	(21,794)	0
Changes in operating assets and liabilities:
Decrease in trade and other receivables, net	16,162	33,045
(Increase) decrease in inventories	(10,485)	4,682
Increase in prepaid expenses and other assets	(152,626)	(36,931)
Increase in accounts payable	58,842	69,634
Increase in accrued interest	13,706	5,486
Decrease in accrued expenses and other liabilities	(71,254)	(47,189)
Increase in customer deposits	740,420	563,546
Dividends received from unconsolidated affiliates	158,942	57,402
Other, net	(2,748)	(6,702)
Net cash provided by operating activities	1,931,586	1,659,280
Investing Activities
Purchases of property and equipment	(2,212,880)	(271,541)
Cash received on settlement of derivative financial instruments	69,195	34,866
Cash paid on settlement of derivative financial instruments	(34,898)	0
Cash received on loans to unconsolidated affiliates	37,607	23,487
Proceeds from the sale of property and equipment	0	230,000
Proceeds from the sale of unconsolidated affiliate	13,215	0
Other, net	(13,220)	(9,144)
Net cash (used in) provided by investing activities	(2,140,981)	7,668
Financing Activities
Debt proceeds	3,929,322	2,236,000
Debt issuance costs	(48,535)	(14,575)
Repayments of debt	(3,029,944)	(3,689,890)
Purchases of treasury stock	(369,476)	0
Dividends paid	(254,645)	(206,039)
Proceeds from exercise of common stock options	4,062	2,385
Other, net	(16,827)	2,626
Net cash provided by (used in) financing activities	213,957	(1,669,493)
Effect of exchange rate changes on cash	(15,676)	419
Net decrease in cash and cash equivalents	(11,114)	(2,126)
Cash and cash equivalents at beginning of period	120,112	132,603
Cash and cash equivalents at end of period	108,998	130,477
Cash paid during the period for:
Interest, net of amount capitalized	$ 114,061	$ 125,007