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Long-term Debt - Debt Table (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Debt Instrument [Line Items] |  |
Debt issuance costs | $ (6,440) | $ (7,730)
Long-term debt, net | 293,560 | 303,080
Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt | 300,000 | 300,000
Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Debt | $ 0 | $ 10,810

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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