Long Term Debt (Schedule of Long Term Debt Payments) (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
2016		$ 3,342
2017		3,358
2018		243,374
2019		3,391
2020		3,407
2021 and thereafter		1,040,241
Long-term debt, gross		1,297,113	$ 1,038,796
Less current portion of long-term debt		3,342	622
Long-term debt, net		1,289,954	1,036,056
Senior Notes [Member] | 2025 Notes
Debt Instrument [Line Items]
Long-term debt, gross	[1]	450,000	$ 0
Less unamortized discount		$ 3,817

[1] On April 1, 2015 (“Closing Date”), we completed an offering of $450.0 million in aggregate principal amount of 6.875% Senior Notes due 2025 (“2025 Notes”) at an issue price of 99.105%. We used the net proceeds from this offering to repay and retire all $425.0 million of our outstanding senior unsecured notes due 2019 (“2019 Notes”).At any time before April 15, 2020, the 2025 Notes are redeemable at our option, in whole or in part, on not less than thirty nor more than sixty days’ notice, at a redemption price equal to 100% of the principal amount of the 2025 Notes, plus a premium calculated as defined in the 2025 Notes agreement, and accrued and unpaid interest (if any) to the date of redemption.At any time on or after April 15, 2020, the 2025 Notes are redeemable at our option, in whole or in part, on not less than thirty nor more than sixty days’ notice, at the following redemption prices (expressed as percentages of principal amount), plus accrued and unpaid interest (if any) to the date of redemption:If redeemed during the twelve month period commencing April 15 of the year indicated:Redemption Price2020103.438%2021102.292%2022101.146%2023 and thereafter100.000%The 2025 Notes mature on April 15, 2025. Semi-annual interest payments are payable on April 15 and October 15. The 2025 Notes were issued pursuant to an Indenture, dated as of April 1, 2015, between us and MUFG Union Bank, N.A., as trustee.We are not required to make mandatory sinking fund payments with respect to the 2025 Notes.Upon the occurrence of a change of control, each holder of the 2025 Notes will have the right to require us to purchase all or any part of such holder’s 2025 Notes at a purchase price equal to 101% of the principal amount of such 2021 Notes, plus accrued and unpaid interest on such 2025 Notes, if any. If we or certain of our subsidiaries engage in asset sales, we must generally either invest the net cash proceeds from such sales in our business within a period of time, prepay debt under any outstanding credit facility, or make an offer to purchase a principal amount of the 2025 Notes equal to the excess net cash proceeds, with the purchase price equal to 100% of their principal amount, plus accrued and unpaid interest, if any.The 2025 Notes are senior unsecured obligations which rank equally in right of payment with our existing and future senior unsecured debt, including our 6.75% Senior Notes due 2021, and senior in right of payment to all future subordinated indebtedness.The covenants in the indenture restrict us and certain of our subsidiaries from incurring additional debt or entering into sale and leaseback transactions; paying dividends or distributions on capital stock or repurchase capital stock; issuing stock of subsidiaries; making certain investments; creating liens on assets to secure debt; entering into transactions with affiliates; merging or consolidating with another company; and transferring and selling assets. These covenants are subject to a number of limitations and exceptions, as further described in the 2025 Notes indenture.At any time after the occurrence and during the continuation of an event of default under the Indenture, the trustee or holders of not less than 30% in aggregate principal amount of the 2025 Notes may, among other options, declare the 2025 Notes immediately due and payable.We paid closing costs totaling $7.9 million in connection with the offering, which were recorded as deferred loan costs and are being amortized over the term of the 2025 Notes. We recorded a $27.7 million loss on extinguishment of debt in our Consolidated Statement of Operations for the year ended December 31, 2015. Included in the loss was $20.2 million in call premium payments to redeem our 2019 Notes, $5.4 million in unamortized 2019 Notes deferred loan costs, and $2.1 million for the unamortized portion of the 2019 Notes original issue discount.We were in compliance with all 2025 Notes loan covenants at December 31, 2015.