Condensed Consolidating Financial Information (Cash Flow) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 514,325	$ 370,039	$ 375,762
Cash flows from investing activities:
Capital expenditures	(79,220)	(68,321)	(39,739)
Investments in and loans to investees	(354)	(24,199)	(1,184,587)
Investments in and loans to investees	(95,000)	(24,250)	(5,375)
(Increase) decrease to investment in affiliates	0	0
Net cash used in investing activities	(174,574)	(116,770)	(1,223,210)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	982,500	0	600,000
Repayment of long-term debt	(848,000)	(74,000)	0
Premium and fees paid on extinguishment of debt	(40,954)	0	0
Payments for financing costs	(2,070)	0	(9,266)
Payment of promissory note	0	(40,000)	0
Deemed repurchase of restricted stock/units	(10,822)	(14,452)	(22,192)
Purchase of treasury stock	223,237	0	0
Proceeds from stock option exercises	1,228	1,340	1,103
Excess tax benefits from share-based compensation arrangements	789	4,610	6,798
Principal payments on capital lease obligations	(4,288)	(2,945)	(2,401)
Cash contributions from member		0
Distributions to noncontrolling interest	(9,010)	(3,154)	0
Contributions from noncontrolling interest	0	1,322	835
Net cash used in financing activities	(153,864)	(127,279)	574,877
Net increase in cash and cash equivalents from operations	185,887	125,990	(272,571)
Effect of exchange rate changes on cash and cash equivalents	(20,819)	(11,036)	(45,058)
Cash and cash equivalents	481,389	316,321	201,367	$ 521,951
Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(490,685)	(699,029)
Cash flows from investing activities:
Capital expenditures	0	0
Investments in and loans to investees	0	0
Investments in and loans to investees	0	0
(Increase) decrease to investment in affiliates	228,764	625,828
Net cash used in investing activities	228,764	625,828
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0
Repayment of long-term debt	0	0
Premium and fees paid on extinguishment of debt	0
Payments for financing costs	0
Payment of promissory note		0
Deemed repurchase of restricted stock/units	0	0
Purchase of treasury stock	0
Proceeds from stock option exercises	0	0
Excess tax benefits from share-based compensation arrangements	0	0
Principal payments on capital lease obligations	0	0
Cash contributions from member		0
Distributions to noncontrolling interest	0	0
Contributions from noncontrolling interest		0
Net cash used in financing activities	0	0
Net increase in cash and cash equivalents from operations	(261,921)	(73,201)
Effect of exchange rate changes on cash and cash equivalents	261,921	73,201
Cash and cash equivalents	0	0	0
Parent Company [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	401,179	1,050,818
Cash flows from investing activities:
Capital expenditures	0	(9)
Investments in and loans to investees	0	0
Investments in and loans to investees	0	0
(Increase) decrease to investment in affiliates	(159,533)	(890,626)
Net cash used in investing activities	(159,533)	(890,635)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	982,500
Repayment of long-term debt	(848,000)	(74,000)
Premium and fees paid on extinguishment of debt	(40,954)
Payments for financing costs	(2,070)
Payment of promissory note		0
Deemed repurchase of restricted stock/units	(10,822)	(14,452)
Purchase of treasury stock	223,237
Proceeds from stock option exercises	1,228	1,340
Excess tax benefits from share-based compensation arrangements	789	4,610
Principal payments on capital lease obligations	0	0
Cash contributions from member		0
Distributions to noncontrolling interest	0	0
Contributions from noncontrolling interest		0
Net cash used in financing activities	(140,566)	(82,502)
Net increase in cash and cash equivalents from operations	101,080	77,681
Effect of exchange rate changes on cash and cash equivalents	(100,949)	(78,828)
Cash and cash equivalents	565	434	1,581
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	548,381	(294,219)
Cash flows from investing activities:
Capital expenditures	(42,064)	(40,592)
Investments in and loans to investees	0	0
Investments in and loans to investees	0	0
(Increase) decrease to investment in affiliates	(69,231)	466,322
Net cash used in investing activities	(111,295)	425,730
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0
Repayment of long-term debt	0	0
Premium and fees paid on extinguishment of debt	0
Payments for financing costs	0
Payment of promissory note		0
Deemed repurchase of restricted stock/units	0	0
Purchase of treasury stock	0
Proceeds from stock option exercises	0	0
Excess tax benefits from share-based compensation arrangements	0	0
Principal payments on capital lease obligations	(2,475)	(2,218)
Cash contributions from member		(8,492)
Distributions to noncontrolling interest	0	0
Contributions from noncontrolling interest		0
Net cash used in financing activities	(2,475)	6,274
Net increase in cash and cash equivalents from operations	434,611	137,785
Effect of exchange rate changes on cash and cash equivalents	(261,921)	(73,201)
Cash and cash equivalents	320,950	148,260	83,676
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	55,450	312,469
Cash flows from investing activities:
Capital expenditures	(37,156)	(27,720)
Investments in and loans to investees	(354)	(24,199)
Investments in and loans to investees	(95,000)	(24,250)
(Increase) decrease to investment in affiliates	0	(201,524)
Net cash used in investing activities	(132,510)	(277,693)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0
Repayment of long-term debt	0	0
Premium and fees paid on extinguishment of debt	0
Payments for financing costs	0
Payment of promissory note		(40,000)
Deemed repurchase of restricted stock/units	0	0
Purchase of treasury stock	0
Proceeds from stock option exercises	0	0
Excess tax benefits from share-based compensation arrangements	0	0
Principal payments on capital lease obligations	(1,813)	(727)
Cash contributions from member		8,492
Distributions to noncontrolling interest	(9,010)	(3,154)
Contributions from noncontrolling interest		1,322
Net cash used in financing activities	(10,823)	(51,051)
Net increase in cash and cash equivalents from operations	(87,883)	(16,275)
Effect of exchange rate changes on cash and cash equivalents	80,130	67,792
Cash and cash equivalents	$ 159,874	$ 167,627	$ 116,110