Condensed Consolidating Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net Cash Provided by (Used in) Operating Activities	$ 167,221	$ 178,159
Cash flows from investing activities:
Capital expenditures, net of related payables	(87,633)	(51,168)
Proceeds from asset sales	8,318	8,209
Proceeds from repayment of related party notes receivable	18,330	0
Deposit for business acquisition	(20,002)	0
Distributions in excess of earnings from joint ventures	476	484
Distributions from subsidiaries	0	0
Proceeds from repayment of advances to subsidiaries, net	0	0
Loans to parent, net	0	0
Native American development costs	(933)	(1,219)
Investment in subsidiaries	0	0
Other, net	(1,312)	(1,969)
Net cash provided by (used in) investing activities	(82,756)	(45,663)
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	1,717,500	3,000
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	(53,900)	22,000
Payments under credit agreements with original maturities greater than three months	(1,468,613)	(71,504)
Capital contributions from parent	419,475	0
Distributions to members and noncontrolling interests	(107,413)	(82,314)
Deemed distributions	(389,054)	0
Payment of debt issuance costs	(36,778)	(446)
Payments on derivative instruments with other-than-insignificant financing elements	(10,831)	(5,040)
Loans from subsidiaries, net	0	0
Payments on advances from parent, net	0	0
Payment of note payable	(6,000)	0
Payments on other debt	(21,216)	(1,707)
Other, net	1,514	(1,781)
Net cash provided by (used in) financing activities	44,684	(137,792)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	129,149	(5,296)
Balance, beginning of period	116,623	123,316
Balance, end of period	245,772	118,020
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	55,545	61,480
Capital expenditures incurred but not yet paid	27,855	15,291
Proceeds from asset sales included in accounts receivable	0	12,482
Parent [Member]
Net Cash Provided by (Used in) Operating Activities	(65,864)	(53,447)
Cash flows from investing activities:
Capital expenditures, net of related payables	(10,654)	(12,139)
Proceeds from asset sales	0	13
Proceeds from repayment of related party notes receivable	0
Deposit for business acquisition	(20,002)
Distributions in excess of earnings from joint ventures	0	0
Distributions from subsidiaries	53,462	15,764
Proceeds from repayment of advances to subsidiaries, net	54,408	84,340
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	(70,174)	(29)
Other, net	22	(934)
Net cash provided by (used in) investing activities	7,062	87,015
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	1,717,500	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	(20,000)	0
Payments under credit agreements with original maturities greater than three months	(1,468,613)	(69,153)
Capital contributions from parent	419,475	0
Distributions to members and noncontrolling interests	(100,991)	(39,350)
Deemed distributions	(389,054)
Payment of debt issuance costs	(35,621)	0
Payments on derivative instruments with other-than-insignificant financing elements	(10,831)	(4,107)
Loans from subsidiaries, net	84,993	87,317
Payments on advances from parent, net	0	0
Payment of note payable	0
Payments on other debt	(1,080)	(1,005)
Other, net	1,514	(684)
Net cash provided by (used in) financing activities	197,292	(26,982)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	138,490	6,586
Balance, beginning of period	5,897	13,554
Balance, end of period	144,387	20,140
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	52,038	57,829
Capital expenditures incurred but not yet paid	4,336	5,734
Proceeds from asset sales included in accounts receivable		0
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	218,563	218,659
Cash flows from investing activities:
Capital expenditures, net of related payables	(76,679)	(38,459)
Proceeds from asset sales	8,316	7,500
Proceeds from repayment of related party notes receivable	18,330
Deposit for business acquisition	0
Distributions in excess of earnings from joint ventures	476	484
Distributions from subsidiaries	6,422	6,216
Proceeds from repayment of advances to subsidiaries, net	0	0
Loans to parent, net	(84,993)	(87,317)
Native American development costs	(933)	(1,219)
Investment in subsidiaries	0	0
Other, net	(847)	(997)
Net cash provided by (used in) investing activities	(129,908)	(113,792)
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	0	3,000
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	(33,900)	22,000
Payments under credit agreements with original maturities greater than three months	0	(750)
Capital contributions from parent	69,696	0
Distributions to members and noncontrolling interests	(53,462)	(52,764)
Deemed distributions	0
Payment of debt issuance costs	0	(446)
Payments on derivative instruments with other-than-insignificant financing elements	0	(933)
Loans from subsidiaries, net	0	0
Payments on advances from parent, net	(54,408)	(84,340)
Payment of note payable	(6,000)
Payments on other debt	(19,327)	(702)
Other, net	0	(1,097)
Net cash provided by (used in) financing activities	(97,401)	(116,032)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(8,746)	(11,165)
Balance, beginning of period	107,114	105,189
Balance, end of period	98,368	94,024
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	1,330	1,701
Capital expenditures incurred but not yet paid	23,263	9,463
Proceeds from asset sales included in accounts receivable		12,482
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	0
Proceeds from repayment of related party notes receivable	0
Deposit for business acquisition	0
Distributions in excess of earnings from joint ventures	0	0
Distributions from subsidiaries	(53,462)	(15,764)
Proceeds from repayment of advances to subsidiaries, net	(54,408)	(84,340)
Loans to parent, net	84,993	87,317
Native American development costs	0	0
Investment in subsidiaries	69,696	0
Other, net	0	0
Net cash provided by (used in) investing activities	46,819	(12,787)
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	0	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	0	0
Payments under credit agreements with original maturities greater than three months	0	0
Capital contributions from parent	(69,696)	0
Distributions to members and noncontrolling interests	53,462	15,764
Deemed distributions	0
Payment of debt issuance costs	0	0
Payments on derivative instruments with other-than-insignificant financing elements	0	0
Loans from subsidiaries, net	(84,993)	(87,317)
Payments on advances from parent, net	54,408	84,340
Payment of note payable	0
Payments on other debt	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(46,819)	12,787
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	0	0
Balance, beginning of period	0	0
Balance, end of period	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
Proceeds from asset sales included in accounts receivable		0
Parent and Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	152,699	165,212
Cash flows from investing activities:
Capital expenditures, net of related payables	(87,333)	(50,598)
Proceeds from asset sales	8,316	7,513
Proceeds from repayment of related party notes receivable	18,330
Deposit for business acquisition	(20,002)
Distributions in excess of earnings from joint ventures	476	484
Distributions from subsidiaries	6,422	6,216
Proceeds from repayment of advances to subsidiaries, net	0	0
Loans to parent, net	0	0
Native American development costs	(933)	(1,219)
Investment in subsidiaries	(478)	(29)
Other, net	(825)	(1,931)
Net cash provided by (used in) investing activities	(76,027)	(39,564)
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	1,717,500	3,000
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	(53,900)	22,000
Payments under credit agreements with original maturities greater than three months	(1,468,613)	(69,903)
Capital contributions from parent	419,475	0
Distributions to members and noncontrolling interests	(100,991)	(76,350)
Deemed distributions	(389,054)
Payment of debt issuance costs	(35,621)	(446)
Payments on derivative instruments with other-than-insignificant financing elements	(10,831)	(5,040)
Loans from subsidiaries, net	0	0
Payments on advances from parent, net	0	0
Payment of note payable	(6,000)
Payments on other debt	(20,407)	(1,707)
Other, net	1,514	(1,781)
Net cash provided by (used in) financing activities	53,072	(130,227)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	129,744	(4,579)
Balance, beginning of period	113,011	118,743
Balance, end of period	242,755	114,164
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	53,368	59,530
Capital expenditures incurred but not yet paid	27,599	15,197
Proceeds from asset sales included in accounts receivable		12,482
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	14,522	12,947
Cash flows from investing activities:
Capital expenditures, net of related payables	(300)	(570)
Proceeds from asset sales	2	696
Proceeds from repayment of related party notes receivable	0
Deposit for business acquisition	0
Distributions in excess of earnings from joint ventures	0	0
Distributions from subsidiaries	0	0
Proceeds from repayment of advances to subsidiaries, net	0	0
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	0	0
Other, net	(487)	(38)
Net cash provided by (used in) investing activities	(785)	88
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	0	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	0	0
Payments under credit agreements with original maturities greater than three months	0	(1,601)
Capital contributions from parent	478	29
Distributions to members and noncontrolling interests	(12,844)	(12,180)
Deemed distributions	0
Payment of debt issuance costs	(1,157)	0
Payments on derivative instruments with other-than-insignificant financing elements	0	0
Loans from subsidiaries, net	0	0
Payments on advances from parent, net	0	0
Payment of note payable	0
Payments on other debt	(809)	0
Other, net	0	0
Net cash provided by (used in) financing activities	(14,332)	(13,752)
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	(595)	(717)
Balance, beginning of period	3,612	4,573
Balance, end of period	3,017	3,856
Supplemental cash flow disclosures:
Cash paid for interest, net of amounts capitalized	2,177	1,950
Capital expenditures incurred but not yet paid	256	94
Proceeds from asset sales included in accounts receivable		0
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	0
Proceeds from repayment of related party notes receivable	0
Deposit for business acquisition	0
Distributions in excess of earnings from joint ventures	0	0
Distributions from subsidiaries	(6,422)	(6,216)
Proceeds from repayment of advances to subsidiaries, net	0	0
Loans to parent, net	0	0
Native American development costs	0	0
Investment in subsidiaries	478	29
Other, net	0	0
Net cash provided by (used in) investing activities	(5,944)	(6,187)
Cash flows from financing activities:
Borrowings under credit agreement with original maturity dates greater than three months	0	0
(Payments) borrowings under credit agreements with original maturity dates of three months or less, net	0	0
Payments under credit agreements with original maturities greater than three months	0	0
Capital contributions from parent	(478)	(29)
Distributions to members and noncontrolling interests	6,422	6,216
Deemed distributions	0
Payment of debt issuance costs	0	0
Payments on derivative instruments with other-than-insignificant financing elements	0	0
Loans from subsidiaries, net	0	0
Payments on advances from parent, net	0	0
Payment of note payable	0
Payments on other debt	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	5,944	6,187
Cash and cash equivalents:
Increase (decrease) in cash and cash equivalents	0	0
Balance, beginning of period	0	0
Balance, end of period	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
Proceeds from asset sales included in accounts receivable		$ 0