For an unclassified balance sheet, the accumulated amortization, as of the reporting date, representing the periodic charge to earnings of deferred costs which are associated with debt obligations existing as of the end of the period.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

+ References

No definition available.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Staff Accounting Bulletin (SAB)
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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Long-term Debt (Details) - USD ($) $ in Thousands	Feb. 08, 2016	Dec. 31, 2014	Dec. 31, 2013	Oct. 30, 2013
Long-term Debt
Long-term debt		$ 1,267,637	$ 1,076,953
Less current maturities of long-term debt		(30,853)	(27,598)
discount on senior secured credit facility Term Loan B		(1,056)	(1,224)
Less debt issuance costs, net of accumulated amortization of $6.8 million and $0.9 million, respectively		(25,151)	(30,734)
Long-term debt, net of current maturities		1,210,577	1,017,397
Accumulated amortization for debt issuance costs		6,800	900
Senior Secured Credit Facility
Long-term Debt
Long-term debt		807,500	750,000
$300 million 5.875% senior unsecured notes due November 1, 2021
Long-term Debt
Long-term debt	$ 300,000	$ 300,000	300,000	$ 300,000
Debt instrument interest rate stated percentage		5.875%		5.875%
Other long-term obligations
Long-term Debt
Long-term debt		$ 135,000
Capital leases
Long-term Debt
Long-term debt		$ 25,137	$ 26,953