Condensed Consolidating Financial Statements (Cash Flow) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net cash provided by operating activities	$ 300,973	$ 261,830
Cash flows from investing activities:
Capital expenditures	(48,810)	(24,340)
Payments for acquisition of a business, net of cash acquired	(6,545)	(1,024,427)
Purchases of investments	(24,250)	(3,984)
(Increase) decrease to investment in affiliates	0	0
Proceeds from insurance settlements	0	654
Net cash used in investing activities	(79,605)	(1,052,097)
Cash flows from financing activities:
Principal payments on long-term debt	(55,500)	0
Payment of Promissory Note	(40,000)	0
Deemed repurchases of restricted stock/units	(14,454)	(17,804)
Proceeds from stock option exercises	1,183	1,070
Excess tax benefits from share-based compensation arrangements	4,297	5,662
Principal payments on capital lease obligations	(2,392)	(2,707)
Proceeds from the issuance of long-term debt	0	600,000
Payments for financing costs	0	(9,266)
Long-term intercompany debt		0
Cash contributions from member		0
Distributions to noncontrolling interest	(3,154)	0
Contributions from noncontrolling interest	1,354	835
Net cash (used in) provided by financing activities	(108,666)	577,790
Net increase (decrease) in cash and cash equivalents from continuing operations	112,702	(212,477)
Cash flows from discontinued operations
Net cash used in operating activities	0	(2,955)
Net decrease in cash and cash equivalents from discontinued operations	0	(2,955)
Effect of exchange rate changes on cash and cash equivalents	(6,514)	(9,897)
Cash and cash equivalents at beginning of period	201,367	521,951
Cash and cash equivalents at end of period	307,555	296,622
Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net cash provided by operating activities	(503,441)	(222,800)
Cash flows from investing activities:
Capital expenditures	0	0
Payments for acquisition of a business, net of cash acquired	0	0
Purchases of investments	0	0
(Increase) decrease to investment in affiliates	434,097	176,967
Proceeds from insurance settlements		0
Net cash used in investing activities	434,097	176,967
Cash flows from financing activities:
Principal payments on long-term debt	$ 0
Payment of Promissory Note
Deemed repurchases of restricted stock/units	$ 0	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
Proceeds from the issuance of long-term debt		0
Payments for financing costs		0
Long-term intercompany debt		0
Cash contributions from member		0
Distributions to noncontrolling interest	0
Contributions from noncontrolling interest	0	0
Net cash (used in) provided by financing activities	0	0
Net increase (decrease) in cash and cash equivalents from continuing operations	(69,344)	(45,833)
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Net decrease in cash and cash equivalents from discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	69,344	45,833
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Parent Company [Member]
Cash flows from operating activities:
Net cash provided by operating activities	287,714	166,339
Cash flows from investing activities:
Capital expenditures	(9)	(1,426)
Payments for acquisition of a business, net of cash acquired	0	0
Purchases of investments	0	0
(Increase) decrease to investment in affiliates	(152,175)	(43,581)
Proceeds from insurance settlements		0
Net cash used in investing activities	(152,184)	(45,007)
Cash flows from financing activities:
Principal payments on long-term debt	(55,500)
Payment of Promissory Note	0
Deemed repurchases of restricted stock/units	(14,454)	(17,804)
Proceeds from stock option exercises	1,183	1,070
Excess tax benefits from share-based compensation arrangements	4,297	5,662
Principal payments on capital lease obligations	0	0
Proceeds from the issuance of long-term debt		600,000
Payments for financing costs		(9,266)
Long-term intercompany debt		(651,405)
Cash contributions from member		0
Distributions to noncontrolling interest	0
Contributions from noncontrolling interest	0	0
Net cash (used in) provided by financing activities	(64,474)	(71,743)
Net increase (decrease) in cash and cash equivalents from continuing operations	71,056	49,589
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Net decrease in cash and cash equivalents from discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	(72,152)	(45,833)
Cash and cash equivalents at beginning of period	1,581	942
Cash and cash equivalents at end of period	485	4,698
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by operating activities	171,707	292,623
Cash flows from investing activities:
Capital expenditures	(31,276)	(16,144)
Payments for acquisition of a business, net of cash acquired	0	0
Purchases of investments	0	(3,482)
(Increase) decrease to investment in affiliates	2,238	(133,386)
Proceeds from insurance settlements		654
Net cash used in investing activities	(29,038)	(152,358)
Cash flows from financing activities:
Principal payments on long-term debt	0
Payment of Promissory Note	0
Deemed repurchases of restricted stock/units	0	0
Proceeds from stock option exercises	0	0
Excess tax benefits from share-based compensation arrangements	0	0
Principal payments on capital lease obligations	(1,635)	(1,382)
Proceeds from the issuance of long-term debt		0
Payments for financing costs		0
Long-term intercompany debt		651,405
Cash contributions from member		(1,046,413)
Distributions to noncontrolling interest	0
Contributions from noncontrolling interest	0	0
Net cash (used in) provided by financing activities	(1,635)	(396,390)
Net increase (decrease) in cash and cash equivalents from continuing operations	141,034	(256,125)
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Net decrease in cash and cash equivalents from discontinued operations	0	0
Effect of exchange rate changes on cash and cash equivalents	(69,344)	(45,833)
Cash and cash equivalents at beginning of period	83,676	519,392
Cash and cash equivalents at end of period	155,366	217,434
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by operating activities	344,993	25,668
Cash flows from investing activities:
Capital expenditures	(17,525)	(6,770)
Payments for acquisition of a business, net of cash acquired	(6,545)	(1,024,427)
Purchases of investments	(24,250)	(502)
(Increase) decrease to investment in affiliates	(284,160)	0
Proceeds from insurance settlements		0
Net cash used in investing activities	(332,480)	(1,031,699)
Cash flows from financing activities:
Principal payments on long-term debt	0
Payment of Promissory Note	(40,000)
Deemed repurchases of restricted stock/units	0	0
Proceeds from stock option exercises	0	0
Excess tax benefits from share-based compensation arrangements	0	0
Principal payments on capital lease obligations	(757)	(1,325)
Proceeds from the issuance of long-term debt		0
Payments for financing costs		0
Long-term intercompany debt		0
Cash contributions from member		1,046,413
Distributions to noncontrolling interest	(3,154)
Contributions from noncontrolling interest	1,354	835
Net cash (used in) provided by financing activities	(42,557)	1,045,923
Net increase (decrease) in cash and cash equivalents from continuing operations	(30,044)	39,892
Cash flows from discontinued operations
Net cash used in operating activities	0	(2,955)
Net decrease in cash and cash equivalents from discontinued operations	0	(2,955)
Effect of exchange rate changes on cash and cash equivalents	65,638	35,936
Cash and cash equivalents at beginning of period	116,110	1,617
Cash and cash equivalents at end of period	$ 151,704	$ 74,490