Debt Instrument, Covenant, Available Liquidity, Minimum allowed

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- Definition

Debt Instrument, Covenant, Capitalization Ratio, Maximum allowed (as a percent)

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- Definition

Debt Instrument, Covenant, Consolidated Net Worth minimum allowed

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- Definition

The average effective interest rate during the reporting period, which includes the expected patronage credits.

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No definition available.

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- Definition

Amount of commitment fees, as a percentage, for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

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No definition available.

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- Definition

Amount of equal principal balance installment payments due each year of the six, seven, eight, and ninth anniversaries of the Closing Date.

+ References

No definition available.

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- Definition

Minimum amount that must be reborrowed during each instance.

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No definition available.

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- Definition

Number of reborrowing instances allowed under the agreement.

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No definition available.

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- Definition

Threshold of amount of capital expenditures made during four consecutive quarters, maximum

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No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
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- Definition

The average effective interest rate during the reporting period.

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- Definition

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

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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.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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- Definition

Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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- 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.

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Debt (Details) $ in Thousands	6 Months Ended
Debt (Details) $ in Thousands	Jun. 30, 2017 USD ($) Integer8	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Aug. 29, 2016 USD ($)	Mar. 30, 2016 USD ($)
Debt [Line Items]
Long-term Debt	$ 438,200		$ 437,629
Deferred financing costs	(6,800)		(7,371)
Senior Notes [Abstract]
Interest paid	11,900	$ 11,200
Medium-term notes [Member] \| Term Loan Due 2022 [Member]
Debt [Line Items]
Long-term Debt	50,000		50,000
Term Loan [Abstract]
Term Loan, Face Amount	$ 50,000
Term Loan, Average Interest Rate During Period	2.65%
Term Loan, Average Interest Rate During Period With Patronage Credits	1.90%
Senior Notes [Abstract]
Senior Notes, Face Amount	$ 50,000
Medium-term notes [Member] \| Term Loan Due 2022 [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	1.75%
Medium-term notes [Member] \| Term Loan Due 2022 [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	2.25%
Medium-term notes [Member] \| Term Loan Due 2022 [Member] \| Base Rate [Member] \| Minimum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	0.75%
Medium-term notes [Member] \| Term Loan Due 2022 [Member] \| Base Rate [Member] \| Maximum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	1.25%
Medium-term notes [Member] \| Term Loan Due 2026 [Member]
Debt [Line Items]
Long-term Debt	$ 45,000		45,000
Term Loan [Abstract]
Term Loan, Face Amount					$ 75,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 10,000
Debt Instrument, Unused Borrowing Capacity, Amount			30,000
Number of reborrowing instances allowed \| Integer8	3
Minimum reborrowing amounts	$ 10,000
Debt Instrument, Unused Borrowing Capacity, Fee (as a percentage)	0.325%
Debt Instrument, Covenant, Capitalization Ratio, Maximum (as a percent)	60.00%
Debt Instrument, Covenant, Consolidated Net Worth, Minimum	$ 350,000
Debt Instrument, Covenant, Available Liquidity, Minimum	100,000
Threshold of amount of capital expenditures made during four consecutive quarters, maximum	$ 50,000
Term Loan, Average Interest Rate During Period	2.77%
Term Loan, Average Interest Rate During Period With Patronage Credits	2.00%
Senior Notes [Abstract]
Senior Notes, Face Amount					$ 75,000
Medium-term notes [Member] \| Term Loan Due 2026 [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	1.875%
Medium-term notes [Member] \| Term Loan Due 2026 [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	2.125%
Medium-term notes [Member] \| Term Loan Due 2026 [Member] \| Base Rate [Member] \| Minimum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	0.875%
Medium-term notes [Member] \| Term Loan Due 2026 [Member] \| Base Rate [Member] \| Maximum [Member]
Term Loan [Abstract]
Basis spread on variable interest rate	1.125%
Senior notes [Member] \| 5.625% Senior Notes Due 2024 [Member]
Debt [Line Items]
Long-term Debt	$ 350,000		$ 350,000
Term Loan [Abstract]
Term Loan, Face Amount				$ 350,000
Senior Notes [Abstract]
Senior Notes, Face Amount				$ 350,000
Interest rate				5.625%