Condensed Consolidating Guarantor Financial Statements - Cash Flow Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 28,009	$ 48,899
Cash flows from investing activities:
Capital expenditures	(92,248)	(74,879)
Proceeds from sale of long-lived assets	15,500	40
Contributions to equity method investments	(2,490)	(1,356)
Distributions in excess of equity in earnings of affiliates	4,392	6,074
Net cash used in investing activities	(74,846)	(70,121)
Cash flows from financing activities:
Debt issuance costs	(4,632)	0
Borrowings on credit facilities and issuance of senior unsecured notes, net of discount	437,018	174,000
Principal payments on credit facilities and other obligations	(348,278)	(110,011)
Debt extinguishment costs	(16,293)	0
Distributions to noncontrolling interests	0	(10,833)
Payments for Repurchase of Common Stock	1,047	807
Payments of Ordinary Dividends, Common Stock	29,770	19,887
Proceeds from issuance of common stock under employee stock purchase plan	231	269
Intercompany borrowings (advances), net	0	0
Net cash provided by financing activities	37,229	32,731
Effect of exchange rate changes on cash and cash equivalents	1,248	2,884
Change in cash and cash equivalents	(8,360)	14,393
Cash and cash equivalents at beginning of period	74,216	58,096
Cash and cash equivalents at end of period	65,856	72,489
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	(11,492)	26,421
Cash flows from investing activities:
Capital expenditures	(1,863)	(1,357)
Proceeds from sale of long-lived assets	0	0
Contributions to equity method investments	0	0
Distributions in excess of equity in earnings of affiliates	0	2,158
Net cash used in investing activities	(1,863)	801
Cash flows from financing activities:
Debt issuance costs	(4,632)
Borrowings on credit facilities and issuance of senior unsecured notes, net of discount	437,018	90,500
Principal payments on credit facilities and other obligations	(348,272)	(50,500)
Debt extinguishment costs	(16,293)
Distributions to noncontrolling interests		0
Payments for Repurchase of Common Stock	1,047	807
Payments of Ordinary Dividends, Common Stock	29,770	19,887
Proceeds from issuance of common stock under employee stock purchase plan	231	269
Intercompany borrowings (advances), net	(34,668)	(48,748)
Net cash provided by financing activities	2,567	(29,173)
Effect of exchange rate changes on cash and cash equivalents	0	0
Change in cash and cash equivalents	(10,788)	(1,951)
Cash and cash equivalents at beginning of period	19,002	4,559
Cash and cash equivalents at end of period	8,214	2,608
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	34,314	25,221
Cash flows from investing activities:
Capital expenditures	(13,384)	(20,966)
Proceeds from sale of long-lived assets	15,191	0
Contributions to equity method investments	(2,490)	(1,356)
Distributions in excess of equity in earnings of affiliates	4,392	6,074
Net cash used in investing activities	3,709	(16,248)
Cash flows from financing activities:
Debt issuance costs	0
Borrowings on credit facilities and issuance of senior unsecured notes, net of discount	0	83,500
Principal payments on credit facilities and other obligations	(6)	(59,511)
Debt extinguishment costs	0
Distributions to noncontrolling interests		(10,833)
Payments for Repurchase of Common Stock	0	0
Payments of Ordinary Dividends, Common Stock	0	0
Proceeds from issuance of common stock under employee stock purchase plan	0	0
Intercompany borrowings (advances), net	(38,017)	(20,516)
Net cash provided by financing activities	(38,023)	(7,360)
Effect of exchange rate changes on cash and cash equivalents	0	0
Change in cash and cash equivalents	0	1,613
Cash and cash equivalents at beginning of period	0	9,058
Cash and cash equivalents at end of period	0	10,671
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	5,187	14,705
Cash flows from investing activities:
Capital expenditures	(77,001)	(52,556)
Proceeds from sale of long-lived assets	309	40
Contributions to equity method investments	0	0
Distributions in excess of equity in earnings of affiliates	0	0
Net cash used in investing activities	(76,692)	(52,516)
Cash flows from financing activities:
Debt issuance costs	0
Borrowings on credit facilities and issuance of senior unsecured notes, net of discount	0	0
Principal payments on credit facilities and other obligations	0	0
Debt extinguishment costs	0
Distributions to noncontrolling interests		0
Payments for Repurchase of Common Stock	0	0
Payments of Ordinary Dividends, Common Stock	0	0
Proceeds from issuance of common stock under employee stock purchase plan	0	0
Intercompany borrowings (advances), net	72,548	50,182
Net cash provided by financing activities	72,548	50,182
Effect of exchange rate changes on cash and cash equivalents	1,248	2,884
Change in cash and cash equivalents	2,291	15,255
Cash and cash equivalents at beginning of period	59,796	46,043
Cash and cash equivalents at end of period	62,087	61,298
Consolidating Adjustments [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	0	(17,448)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of long-lived assets	0	0
Contributions to equity method investments	0	0
Distributions in excess of equity in earnings of affiliates	0	(2,158)
Net cash used in investing activities	0	(2,158)
Cash flows from financing activities:
Debt issuance costs	0
Borrowings on credit facilities and issuance of senior unsecured notes, net of discount	0	0
Principal payments on credit facilities and other obligations	0	0
Debt extinguishment costs	0
Distributions to noncontrolling interests		0
Payments for Repurchase of Common Stock	0	0
Payments of Ordinary Dividends, Common Stock	0	0
Proceeds from issuance of common stock under employee stock purchase plan	0	0
Intercompany borrowings (advances), net	137	19,082
Net cash provided by financing activities	137	19,082
Effect of exchange rate changes on cash and cash equivalents	0	0
Change in cash and cash equivalents	137	(524)
Cash and cash equivalents at beginning of period	(4,582)	(1,564)
Cash and cash equivalents at end of period	$ (4,445)	$ (2,088)