Long-term Debt - Schedule of Long-term Instruments (Details) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Jun. 30, 2015	Jun. 18, 2011	Jan. 03, 2012	Sep. 28, 2012
Debt Instrument [Line Items]
Long-term debt		$ 2,146,599,000	$ 2,198,148,000
Current portion of long-term debt		(80,892,000)	(69,813,000)
Total long-term debt, net		2,065,707,000	2,128,335,000
Letters of Credit Outstanding, Amount		34,300,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		80,892,000
Long-term Debt, Maturities, Repayments of Principal in Year Two		191,996,000
Long-term Debt, Maturities, Repayments of Principal in Year Three		51,499,000
Long-term Debt, Maturities, Repayments of Principal in Year Four		54,582,000
Long-term Debt, Maturities, Repayments of Principal in Year Five		19,135,000
Long-term Debt, Maturities, Repayments of Principal after Year Five		1,802,584,000
Long-term Debt, Gross		2,200,688,000
Loss on extinguishment of debt	(146,800,000)	(4,132,000)	(146,787,000)	(51,796,000)
Accretion (Amortization) of Discounts, Long-term Debt		(54,089,000)
Payments of Financing Costs			35,900,000
7.50% Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt		494,682,000	494,041,000
Debt Instrument, Interest Rate Terms		Fixed rate
Debt Instrument, Interest Rate, Stated Percentage		7.50%	7.50%
Unamortized discount on long-term debt		5,300,000	6,000,000
Long-term debt, aggregate principal amount		500,000,000
Restructured Land Loan [Member]
Debt Instrument [Line Items]
Long-term debt		106,783,000	99,820,000
Debt Instrument, Interest Rate at Period End		3.67%	3.67%
Unamortized discount on long-term debt		6,700,000	10,700,000
Long-term debt, aggregate principal amount		105,000,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount		315,700,000
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt		1,503,831,000	1,561,415,000
Description of variable interest rate basis		LIBOR or base rate
Debt Instrument, Interest Rate at Period End		4.25%	5.00%
Unamortized discount on long-term debt		42,100,000	51,400,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt		0	0
Description of variable interest rate basis		LIBOR or base rate
Other Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term debt		41,303,000	42,872,000
Unamortized discount on long-term debt		0	0
Long-term Debt, weighted average interest rate		3.98%	3.93%
Propco [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							1,575,000,000
Propco [Member] | Tranche B-1 [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							200,000,000
Propco [Member] | Tranche B-2 [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							750,000,000
Propco [Member] | Tranche B-3 [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							625,000,000	625,000,000
Propco [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount								625,000,000
Propco [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity							125,000,000
Opco and GVR [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount									575,000,000
Opco and GVR [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity									200,000,000
Opco [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt				51,800,000
Opco [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							435,700,000
Opco [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity							25,000,000
GVR Lenders [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity							10,000,000
GVR Lenders [Member] | First Lien Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							215,000,000
GVR Lenders [Member] | Second Lien Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount							90,000,000
Restructured Land Loan [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Description of variable interest rate basis		LIBOR or base rate
Credit Facility [Member]
Debt Instrument [Line Items]
Interest coverage ratio		3.40
Line of Credit Facility, Limit on Additional Credit Facility Commitments		350,000,000
Ratio of Indebtedness to Net Capital		5.02
Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Multiple of Pro Forma First Lien Leverage		4.5
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.50%
Revolving credit facility, maximum borrowing capacity		350,000,000
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest coverage ratio		2.50
Ratio of Indebtedness to Net Capital		5
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest coverage ratio		3
Ratio of Indebtedness to Net Capital		7.00
Term Loan Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity		1,625,000,000.000
Line of Credit Facility, Periodic Payment, Percent of Principal		0.25%
Loss on extinguishment of debt		(4,100,000)
Payments of Financing Costs		2,400,000
Write-off of Unamortized Debt Discount and Debt Issuance Costs		1,700,000
Term Loan Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital		3.5
Term Loan Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital		4.5
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		3.50%
London Interbank Offered Rate (LIBOR) [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		3.25%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum		1.00%
Base Rate [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		2.50%
Base Rate [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate					2.25%
Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		105.625%
Debt Instrument, Redemption, Period One [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		101.00%
Leverage Ratio Above 4.50 [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Prepayment, Percentage of Excess Cash Flow		50.00%
Leverage Ration less than or equal to 4.50 [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Periodic Payment, Percent of Principal		25.00%
Leverage Ratio less than or equal to 3.50 [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Prepayment, Percentage of Excess Cash Flow		0.00%
Subsequent Event [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt						$ 61,000,000