Debt Instrument, number of quarterly payments.

No definition available.

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- Definition

Debt instrument redemption applicable premium percentage.

+ References

No definition available.

+ Details

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- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-Section 55
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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

+ Details

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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Period Type:	duration

- Definition

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

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

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- Definition

Description of debt redemption features under terms of the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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- Definition

Start date of debt instrument redemption period, in CCYY-MM-DD format.

+ References

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

+ Details

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Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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+ Details

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Period Type:	instant

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

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- Details

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- Details

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Long-Term Debt (Details Textual)			3 Months Ended
Long-Term Debt (Details Textual)	Apr. 14, 2022	Apr. 15, 2019 USD ($)	Mar. 31, 2019 USD ($) Installment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Debt Instrument, Outstanding Amount			$ 1,114,868,000		$ 971,043,000
Borrowing outstanding, principal amount			145,000,000
Repayment of debt			2,000,000	$ 2,000,000
Senior Secured First Lien Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			1,000,000,000
Senior Secured First Lien Credit Facility [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Repayment of debt		$ 18,000,000
Senior Secured First Lien Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 200,000,000
Line of Credit Facility, Expiration Date			Oct. 20, 2022
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, Outstanding Amount			$ 790,000,000
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 Second Lien Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing outstanding, principal amount			145,000,000
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			$ 200,000,000
Debt Instrument, Maturity Date			Oct. 20, 2025
Credit Facilities [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate			6.10%
Senior Unsecured Notes Due 2026 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 375,000,000
Debt Instrument, Commencement Date of Quarterly Payments		Oct. 31, 2019
Debt instrument interest stated percentage		7.625%
Debt instrument frequency of periodic payment		semi-annually
Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument redemption description			The applicable premium is calculated as the greater of: (i) 1.0% of the principal amount of such 2026 Notes and (ii) the excess, if any, of (a) the present value at such date of redemption of (1) the redemption price of such 2026 Notes on April 15, 2022 plus (2) all required interest payments due on such 2026 Notes through April 15, 2022 (excluding accrued but unpaid interest to the date of redemption), computed using a discount rate equal to the treasury rate (as defined under the indenture governing the 2026 Notes) plus 50 basis points, over (b) the then-outstanding principal amount of such 2026 Notes. The 2026 Notes may be redeemed, in whole or in part, at any time during the 12 months beginning on April 15, 2022 at a redemption price of 103.813%, during the 12 months beginning on April 15, 2023 at a redemption price of 101.906%, and at any time on or after April 15, 2024 at a redemption price of 100%, in each case plus accrued and unpaid interest, if any, thereon to the redemption date
Senior Notes due 2026 [Member] \| Scenario, Forecast [Member]
Debt Instrument [Line Items]
Applicable premium percentage on redemption	1.00%
Senior Notes due 2026 [Member] \| Debt Instrument, Redemption, Period One \| Scenario, Forecast [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage	107.625%
Senior Notes due 2026 [Member] \| Debt Instrument, Redemption, Period One \| 12 Months Beginning on April 15, 2022 [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage	103.813%
Debt instrument redemption period start date	Apr. 15, 2022
Senior Notes due 2026 [Member] \| Debt Instrument, Redemption, Period Two \| Scenario, Forecast [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage	100.00%
Senior Notes due 2026 [Member] \| Debt Instrument, Redemption, Period Two \| 12 Months Beginning on April 15, 2023 [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage	101.906%
Debt instrument redemption period start date	Apr. 15, 2023
Senior Notes due 2026 [Member] \| Debt Instrument, Redemption, Period Three \| On or After April 15, 2024 [Member]
Debt Instrument [Line Items]
Debt instrument redemption price percentage	100.00%
Debt instrument redemption period start date	Apr. 15, 2024
Senior Notes due 2026 [Member] \| Maximum [Member] \| Scenario, Forecast [Member]
Debt Instrument [Line Items]
Debt instrument redemption percentage	40.00%