Condensed Consolidation Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 33,165	$ 14,288
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,952	52,377
Stock-based compensation	6,250	26,715
Interest accretion on notes payable	232	624
Loss on debt extinguishment	2,377	6,557
Amortization of debt issuance costs	2,158	2,383
Other, including (gain) loss on disposal of assets	(143)	1,964
Increase in accounts receivable	(39,613)	(33,082)
Increase in inventories, prepaid expenses and other current assets	(29,850)	(23,338)
(Increase) decrease in deposits and other assets	(481)	524
Increase in accounts payable, deferred income, accrued liabilities and other long-term liabilities	103,365	107,369
Increase in accrued interest payable	591	13
Deferred income taxes	8,575	(11,506)
Net cash provided by operating activities	138,578	144,888
Cash flows from investing activities:
Additions to property and equipment	(81,015)	(70,248)
Property insurance recoveries	320	173
Purchase of identifiable intangible assets	0	(29)
Purchase of restricted-use investments, net	(482)	(457)
Proceeds from sale of assets	1,552	51
Net cash used in investing activities	(79,625)	(70,510)
Cash flow from financing activities:
Repayment of borrowings	(333,026)	(700,808)
Proceeds from borrowings	481,000	828,250
Payment of debt issuance costs	(5,229)	(9,993)
Payment of cash dividends	(106,937)	(98,190)
Proceeds from issuance of common stock	15,103	11,842
Stock repurchases	(44,091)	(21,236)
Purchase of redeemable noncontrolling interests	(223)	(1,552)
Net cash provided by financing activities	6,597	8,313
Effect of exchange rate on cash	(1,762)	(1,790)
Net increase in cash and cash equivalents	63,788	80,901
Cash and cash equivalents at beginning of period	99,760	73,884
Cash and cash equivalents at end of period	163,548	154,785
Supplemental cash flow information
Cash paid for interest	36,814	34,661
Cash paid for income taxes	$ 10,673	$ 4,933