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Long-Term Debt (Tables) | 9 Months Ended
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Sep. 30, 2018
Debt Disclosure [Abstract] |
Components of Long-term debt | Long-term debt consisted of the following:
(in thousands) |  | As of September 30, 2018 |  | As of December 31, 2017
Variable rate credit facility |  | $ | — |  |  | $ | — |
Senior unsecured notes |  | 400,000 |  |  | 400,000 |
Term loan B |  | 297,000 |  |  | 299,250 |
Unsecured subordinated notes |  | — |  |  | 2,656 |
Total outstanding principal |  | 697,000 |  |  | 701,906 |
Less: Debt issuance costs |  | (7,788 | ) |  | (8,631 | )
Less: Current portion |  | (3,000 | ) |  | (5,656 | )
Net carrying value of long-term debt |  | $ | 686,212 |  |  | $ | 687,619 |
Fair value of long-term debt * |  | $ | 682,243 |  |  | $ | 703,572 |
* Fair value of the Senior Notes and the term loan B were estimated based on quoted private market transactions and are classified as Level 1 in the fair value hierarchy. The fair value of the unsecured subordinated notes is determined based on a discounted cash flow analysis using current market interest rates of comparable instruments and is classified as Level 2 in the fair value hierarchy.

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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