Long-Term Debt (Schedule of Long-term Debt Balances) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Unamortized debt issuance cost, net	$ (7,700)	$ (5,000)
Total debt, including current portion	377,057	374,678
Less: current maturities	(11,383)	0
Plus: long-term portion of capital leases	0	23
Total long-term debt	365,674	374,701
9% Senior Unsecured Notes Due 2018 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross	200,000	200,000
Unamortized debt issuance cost, net	(2,203)	(2,986)
Unamortized discount	(847)	(1,148)
Total debt, including current portion	196,950	195,866
Term Loan Due 2017 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross	182,745	182,745
Unamortized debt issuance cost, net	(2,638)	(3,933)
Total debt, including current portion	$ 180,107	$ 178,812

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond 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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