Condensed Consolidating Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Cash Provided by (Used in) Operating Activities	$ 96,128	$ 96,073
Cash flows from investing activities:
Capital expenditures, net of related payables	(41,333)	(31,301)
Proceeds from asset sales	523	0
Distributions in excess of earnings from joint ventures	432	0
Distributions from subsidiaries	0	0
Proceeds from repayment of advances to subsidiaries, net		0
Loans to parent, net	0	0
Native American development costs	(798)	(386)
Investment in subsidiaries	0	0
Other, net	(777)	(746)
Net cash provided by (used in) investing activities	(41,953)	(32,433)
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	185,000	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	0	10,000
Payments under credit agreements with original maturities greater than three months	(209,143)	(48,892)
Capital contributions from parent	0	0
Distributions to members and noncontrolling interests	(15,491)	(8,347)
Payment of debt issuance costs	(16,861)	0
Payments on derivative instruments with other-than-insignificant financing elements	0	(1,786)
Loans from subsidiaries, net	0	0
Payments on advances from parent, net		0
Payments on other debt	(1,398)	(1,361)
Payments to Acquire Additional Interest in Subsidiaries	(4,484)	0
Other, net	(6,119)	(7,316)
Net cash provided by (used in) financing activities	(68,496)	(57,702)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(14,321)	5,938
Cash and Cash Equivalents, at Carrying Value	129,959	116,623
Cash and Cash Equivalents, at Carrying Value	115,638	122,561
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	38,718	39,088
Capital expenditures incurred but not yet paid	29,330	18,213
Parent [Member]
Net Cash Provided by (Used in) Operating Activities	(42,312)	(36,330)
Cash flows from investing activities:
Capital expenditures, net of related payables	(7,236)	(1,706)
Proceeds from asset sales	0
Distributions in excess of earnings from joint ventures	0
Distributions from subsidiaries	7,761	7,308
Proceeds from repayment of advances to subsidiaries, net		31,556
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	(61,900)	(478)
Other, net	13	15
Net cash provided by (used in) investing activities	(61,362)	36,695
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	185,000
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		10,000
Payments under credit agreements with original maturities greater than three months	(151,877)	(48,142)
Capital contributions from parent	0	0
Distributions to members and noncontrolling interests	(13,321)	(364)
Payment of debt issuance costs	(16,687)
Payments on derivative instruments with other-than-insignificant financing elements		(1,786)
Loans from subsidiaries, net	98,178	53,692
Payments on advances from parent, net		0
Payments on other debt	(551)	(499)
Payments to Acquire Additional Interest in Subsidiaries	0
Other, net	0	(1,316)
Net cash provided by (used in) financing activities	100,742	11,585
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(2,932)	11,950
Cash and Cash Equivalents, at Carrying Value	6,455	5,897
Cash and Cash Equivalents, at Carrying Value	3,523	17,847
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	36,703	37,200
Capital expenditures incurred but not yet paid	2,630	4,777
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	134,131	127,418
Cash flows from investing activities:
Capital expenditures, net of related payables	(33,895)	(29,407)
Proceeds from asset sales	522
Distributions in excess of earnings from joint ventures	432
Distributions from subsidiaries	2,170	2,120
Proceeds from repayment of advances to subsidiaries, net		0
Loans to parent, net	(98,178)	(53,692)
Native American development costs	(798)	(386)
Investment in subsidiaries	0	0
Other, net	(790)	(274)
Net cash provided by (used in) investing activities	(130,537)	(81,639)
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		0
Payments under credit agreements with original maturities greater than three months	0	(750)
Capital contributions from parent	0	0
Distributions to members and noncontrolling interests	(7,761)	(13,170)
Payment of debt issuance costs	0
Payments on derivative instruments with other-than-insignificant financing elements		0
Loans from subsidiaries, net	0	0
Payments on advances from parent, net		(31,556)
Payments on other debt	(847)	(862)
Payments to Acquire Additional Interest in Subsidiaries	0
Other, net	(6,119)	(6,000)
Net cash provided by (used in) financing activities	(14,727)	(52,338)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(11,133)	(6,559)
Cash and Cash Equivalents, at Carrying Value	120,307	107,114
Cash and Cash Equivalents, at Carrying Value	109,174	100,555
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	21	907
Capital expenditures incurred but not yet paid	26,517	13,369
Parent and Guarantor Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities	0	0
Cash flows from investing activities:
Capital expenditures, net of related payables	0	0
Proceeds from asset sales	0
Distributions in excess of earnings from joint ventures	0
Distributions from subsidiaries	(7,761)	(7,308)
Proceeds from repayment of advances to subsidiaries, net		(31,556)
Loans to parent, net	98,178	53,692
Native American development costs	0	0
Investment in subsidiaries	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	90,417	14,828
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		0
Payments under credit agreements with original maturities greater than three months	0	0
Capital contributions from parent	0	0
Distributions to members and noncontrolling interests	7,761	7,308
Payment of debt issuance costs	0
Payments on derivative instruments with other-than-insignificant financing elements		0
Loans from subsidiaries, net	(98,178)	(53,692)
Payments on advances from parent, net		31,556
Payments on other debt	0	0
Payments to Acquire Additional Interest in Subsidiaries	0
Other, net	0	0
Net cash provided by (used in) financing activities	(90,417)	(14,828)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	0	0
Capital expenditures incurred but not yet paid	0	0
Parent and Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	91,819	91,088
Cash flows from investing activities:
Capital expenditures, net of related payables	(41,131)	(31,113)
Proceeds from asset sales	522
Distributions in excess of earnings from joint ventures	432
Distributions from subsidiaries	2,170	2,120
Proceeds from repayment of advances to subsidiaries, net		0
Loans to parent, net	0	0
Native American development costs	(798)	(386)
Investment in subsidiaries	(61,900)	(478)
Other, net	(777)	(259)
Net cash provided by (used in) investing activities	(101,482)	(30,116)
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	185,000
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		10,000
Payments under credit agreements with original maturities greater than three months	(151,877)	(48,892)
Capital contributions from parent	0	0
Distributions to members and noncontrolling interests	(13,321)	(6,226)
Payment of debt issuance costs	(16,687)
Payments on derivative instruments with other-than-insignificant financing elements		(1,786)
Loans from subsidiaries, net	0	0
Payments on advances from parent, net		0
Payments on other debt	(1,398)	(1,361)
Payments to Acquire Additional Interest in Subsidiaries	0
Other, net	(6,119)	(7,316)
Net cash provided by (used in) financing activities	(4,402)	(55,581)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(14,065)	5,391
Cash and Cash Equivalents, at Carrying Value	126,762	113,011
Cash and Cash Equivalents, at Carrying Value	112,697	118,402
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	36,724	38,107
Capital expenditures incurred but not yet paid	29,147	18,146
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	4,309	4,985
Cash flows from investing activities:
Capital expenditures, net of related payables	(202)	(188)
Proceeds from asset sales	1
Distributions in excess of earnings from joint ventures	0
Distributions from subsidiaries	0	0
Proceeds from repayment of advances to subsidiaries, net		0
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	0	0
Other, net	0	(487)
Net cash provided by (used in) investing activities	(201)	(675)
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		0
Payments under credit agreements with original maturities greater than three months	(57,266)	0
Capital contributions from parent	61,900	478
Distributions to members and noncontrolling interests	(4,340)	(4,241)
Payment of debt issuance costs	(174)
Payments on derivative instruments with other-than-insignificant financing elements		0
Loans from subsidiaries, net	0	0
Payments on advances from parent, net		0
Payments on other debt	0	0
Payments to Acquire Additional Interest in Subsidiaries	4,484
Other, net	0	0
Net cash provided by (used in) financing activities	(4,364)	(3,763)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(256)	547
Cash and Cash Equivalents, at Carrying Value	3,197	3,612
Cash and Cash Equivalents, at Carrying Value	2,941	4,159
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	1,994	981
Capital expenditures incurred but not yet paid	183	67
Consolidation, Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities	0	0
Cash flows from investing activities:
Capital expenditures, net of related payables	0	0
Proceeds from asset sales	0
Distributions in excess of earnings from joint ventures	0
Distributions from subsidiaries	(2,170)	(2,120)
Proceeds from repayment of advances to subsidiaries, net		0
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	61,900	478
Other, net	0	0
Net cash provided by (used in) investing activities	59,730	(1,642)
Cash flows from financing activities:
Borrowings under credit agreements with original maturity dates greater than three months	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net		0
Payments under credit agreements with original maturities greater than three months	0	0
Capital contributions from parent	(61,900)	(478)
Distributions to members and noncontrolling interests	2,170	2,120
Payment of debt issuance costs	0
Payments on derivative instruments with other-than-insignificant financing elements		0
Loans from subsidiaries, net	0	0
Payments on advances from parent, net		0
Payments on other debt	0	0
Payments to Acquire Additional Interest in Subsidiaries	0
Other, net	0	0
Net cash provided by (used in) financing activities	(59,730)	1,642
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	0	0
Capital expenditures incurred but not yet paid	$ 0	$ 0