Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flow from operating activities:
Net income	$ 192,855	$ 114,034	$ 156,873
Depreciation and amortization	107,411	108,107	128,075
Reorganization items, net	0	0	(180)
Stock-based compensation	56,233	140,038	27,034
Interest accretion on notes payable	856	1,221	1,252
Loss on debt extinguishment	6,557	0	789
Amortization of debt issuance costs	4,518	4,748	4,285
Other, including loss on disposal of assets	17,278	1,672	9,988
Gain on sale of investee	0	(10,031)	0
Increase in accounts receivable	(6,072)	(7,764)	(22,146)
Decrease (increase) in inventories, prepaid expenses and other current assets	306	(5,744)	(2,062)
(Increase) decrease in deposits and other assets	(2,465)	(486)	473
Increase in accounts payable, deferred income, accrued liabilities and other long-term liabilities	41,775	13,293	12,147
Increase (decrease) in accrued interest payable	13	(56)	17,239
Deferred income tax expense	54,496	33,291	34,915
Net cash provided by operating activities	473,761	392,323	368,682
Cash flow from investing activities:
Additions to property and equipment	(114,370)	(108,660)	(101,853)
Property insurance recovery	173	850	0
Purchase of identifiable intangible assets	(29)	(49)	(75)
Purchase of restricted-use investments, net	(565)	(648)	(605)
Proceeds from sale of DCP	0	10,031	0
Proceeds from sale of assets	5,123	148	230
Net cash used in investing activities	(109,668)	(98,328)	(102,303)
Cash flow from financing activities:
Repayment of borrowings	(710,565)	(62,308)	(17,776)
Proceeds from borrowings	834,250	56,000	11,500
Payment of debt issuance costs	(11,916)	0	(2,660)
Net proceeds from issuance of common stock	40,531	38,840	30,860
Stock repurchases	(245,114)	(195,353)	(523,589)
Payment of cash dividends	(200,957)	(184,300)	(176,171)
Purchase of HWP ownership interests	0	0	(9,554)
Purchase of redeemable noncontrolling interest	(1,552)	(19)	(288)
Noncontrolling interest distributions	(38,165)	(38,012)	(37,452)
Net cash used in financing activities	(333,488)	(385,152)	(725,130)
Effect of exchange rate on cash	(4,729)	(4,269)	(1,147)
Increase (decrease) in cash and cash equivalents	25,876	(95,426)	(459,898)
Cash and cash equivalents at beginning of period	73,884	169,310	629,208
Cash and cash equivalents at end of period	99,760	73,884	169,310
Supplemental cash flow information
Cash paid for interest	70,818	67,145	52,268
Cash paid for income taxes	$ 14,975	$ 16,772	$ 13,768