Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Cash paid at termination of interest rate swap

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- Definition

The amount of cash received during the period on settlement of a hedge.

+ References

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- Definition

Fixed interest rate related to the interest rate derivative.

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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
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-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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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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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

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- Definition

Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580

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Derivative Instruments - Derivative Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 19, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax						$ 1,900
Interest Rate Swap [Member] \| Senior Secured Term Loan A [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Maturity Date				Jun. 30, 2020
Cash paid at termination of interest rate swap			$ 4,700
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net			(2,900)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax			$ (1,800)
Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Cash Received on Hedge	$ 1,100
Maximum Remaining Maturity of Foreign Currency Derivatives	5 years	5 years
Derivative, Fixed Interest Rate	2.90%	2.10%			2.90%	2.10%
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net					$ 0	$ 0	$ 0
Maximum [Member] \| Interest Rate Swap [Member] \| Senior Secured Term Loan A [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount				$ 238,400
Maximum [Member] \| Interest Rate Swap [Member] \| Senior Secured Term Loan A [Member] \| Cash Flow Hedging [Member] \| Derivative, June 2020 Maturity [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate				2.68%
Maximum [Member] \| Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 125,000	$ 150,000			125,000	150,000
Minimum [Member] \| Interest Rate Swap [Member] \| Senior Secured Term Loan A [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate				0.74%
Minimum [Member] \| Interest Rate Swap [Member] \| Senior Secured Term Loan A [Member] \| Cash Flow Hedging [Member] \| Derivative, June 2020 Maturity [Member]
Derivative [Line Items]
Derivative, Notional Amount				$ 192,700
Minimum [Member] \| Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 75,000	$ 75,000			$ 75,000	$ 75,000