Amount of the required periodic payments applied to principal as a percentage.

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The maximum additional commitments that may be requested under the credit facility.

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- Definition

Number Of Foreign Subsidiaries Not Subject To Credit Agreement Covenants

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No definition available.

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- Definition

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

+ References

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

Amount of amortization expense attributable to debt issuance costs.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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

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No definition available.

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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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No definition available.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of the required periodic payments applied to principal.

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-Name Accounting Standards Codification
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- Definition

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

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No definition available.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

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No definition available.

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- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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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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-Name Accounting Standards Codification
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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

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

+ References

No definition available.

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Long-Term Debt - Credit Agreement (Details)	1 Months Ended			3 Months Ended	9 Months Ended
Long-Term Debt - Credit Agreement (Details)	Sep. 30, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jun. 30, 2013 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2013 USD ($)
Debt Instrument [Line Items]
Amortization of debt issuance costs					$ 6,430,000	$ 4,117,000
Number of foreign subsidiaries designated as not subject to Credit Agreement covenants					5
Term Loan Maturing June 2018 [Member]
Debt Instrument [Line Items]
Borrowing capacity			$ 300,000,000
Percentage of scheduled principal installments				10.00%
Scheduled principal installments				$ 30,000,000
Balloon payment	$ 180,000,000			$ 180,000,000	$ 180,000,000
Prepayment of debt	8,000,000
Maturity date			Jun. 19, 2018
Term Loan Maturing June 2018 [Member] \| Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Notional amount							$ 148,100,000
Fixed LIBOR rate on interest rate swaps (as a percent)							0.75%
Term Loan Maturing June 2018 [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				4.00%
Term Loan Maturing June 2018 [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.00%
Term Loan Maturing June 2018 [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				2.00%
Term Loan Maturing June 2018 [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				3.00%
Term Loan Maturing June 2018 [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				4.00%
Revolving Credit Facility Maturing June 2018 [Member]
Debt Instrument [Line Items]
Borrowing capacity		$ 400,000,000	$ 600,000,000
Increase in aggregate commitments (up to)			$ 200,000,000
Available borrowing capacity	16,700,000			$ 16,700,000	16,700,000
Letters of credit issued	$ 5,100,000			$ 5,100,000	$ 5,100,000
Commitment fee percentage				0.50%
Amortization of debt issuance costs		$ 2,500,000