The maximum percentage of the acquisition of beneficial ownership of the Company's equity securities.

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Borrowings as percentage of revolving commitment to contain financial covenant regarding maximum net leverage ratio.

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Debt instrument, base floor rate.

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Debt instrument, commencement date of quarterly payments.

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Debt instrument, final installment.

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Debt instrument, LIBOR floor rate.

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Debt Instrument, number of quarterly payments.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments including both interest and principal payments.

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Weighted average interest rate of debt outstanding.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Amount of increase (decrease) of the credit facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Debt (Details Textual)				12 Months Ended
Debt (Details Textual)	Oct. 31, 2017 USD ($)	Oct. 20, 2017	Jul. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) Installment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Outstanding Amount				$ 972,959,000	$ 183,442,000
Gains (Losses) on Extinguishment of Debt				(1,708,000)	$ 18,000	$ (1,174,000)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Undrawn				100,000
Former Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 173,400
Gains (Losses) on Extinguishment of Debt				(1,700)
Former Rocky Gap Financing Facility [Member] \| Centennial Bank [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit			$ 10,700,000
Gains (Losses) on Extinguishment of Debt						$ (1,200,000)
Line of Credit Facility, Increase (Decrease), Net			$ 17,500,000
Senior Secured First Lien Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				900,000,000
Debt Instrument, Outstanding Amount				800,000
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 100,000,000
Line of Credit Facility, Expiration Date				Oct. 20, 2022
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Borrowings as Percentage of Revolving Commitment to Contain Financial Covenant Regarding Maximum Net Leverage Ratio		30.00%
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member] \| LIBOR rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.50%
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member] \| LIBOR rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.00%
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member] \| Base rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.50%
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member] \| Base rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.00%
Senior Secured First Lien Credit Facility [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Outstanding Amount				$ 0
Senior Secured First Lien Credit Facility [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 800,000,000
Debt Instrument, Maturity Date				Oct. 20, 2024
Debt Instrument, Number of Quarterly Payments \| Installment				27
Debt Instrument, Periodic Payment				$ 2,000,000
Debt Instrument, Commencement Date of Quarterly Payments				Mar. 31, 2018
Debt Instrument, Final Installment				$ 746,000,000
Senior Secured First Lien Credit Facility [Member] \| Term Loan [Member] \| LIBOR rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.00%
Senior Secured First Lien Credit Facility [Member] \| Term Loan [Member] \| Base rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.00%
Senior Secured Second Lien Credit Facility [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 200,000,000
Debt Instrument, Outstanding Amount				$ 200,000
Debt Instrument, Maturity Date				Oct. 20, 2025
Senior Secured Second Lien Credit Facility [Member] \| Term Loan [Member] \| LIBOR rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				7.00%
Senior Secured Second Lien Credit Facility [Member] \| Term Loan [Member] \| Base rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				6.00%
Credit Facilities [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate				5.10%
Credit Facilities [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Beneficial Ownership Threshold		50.00%
Credit Facilities [Member] \| Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.50%
Credit Facilities [Member] \| LIBOR rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.00%
Credit Facilities [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Base Floor Rate				1.00%
Credit Facilities [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.375%
Credit Facilities [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.50%
Credit Facilities [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Base Floor Rate				1.75%
Debt Instrument, LIBOR Floor Rate				0.75%