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Debt, Debt Facilities (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Apr. 18, 2018
Debt [Abstract] |  |  |  |
Current portion of long-term debt | $ 59,500 |  | $ 69,455 |
Credit Agreement [Member] |  |  |  |
Debt [Abstract] |  |  |  |
Unamortized debt issuance costs | 3,500 |  | 4,000 |
Credit Agreement Term Loan Facility [Member] |  |  |  |
Debt [Abstract] |  |  |  |
Original principal amount | 400,000 |  |  | $ 400,000
Balance | $ 375,000 | [1],[2] | 385,000 |
Interest rate | Variable 30 day: 4.15% |  |  |
Interest rate | 4.15% |  |  |
Term of variable rate | 30 days |  |  |
Repayment terms | 35% of the principal amount is payable in increasing quarterly installments over a five-year period that began on June 30, 2018, with the remainder payable at the end of the five-year term. |  |  |
Percentage of principal payable in installments | 35.00% |  |  |
Term of loan | 5 years |  |  |
Current portion of long-term debt | $ 22,500 |  |  |
Credit Agreement Revolving Credit Facility [Member] |  |  |  |
Debt [Abstract] |  |  |  |
Balance | $ 37,000 | [1],[2] | $ 49,500 |
Interest rate | Variable 30 day: 4.15% |  |  |
Interest rate | 4.15% |  |  |
Term of variable rate | 30 days |  |  |
Repayment terms | Revolving line of credit expires April 18, 2023. |  |  |
Term of loan | 5 years |  |  |
Current portion of long-term debt | $ 37,000 |  |  |
[1] | As of June 30, 2019, the current portion of the Company’s debt (i.e. becoming due in the next 12 months) included $22.5 million of the balance of its term loan under the Credit Agreement. The Company has classified the $37.0 million borrowed under the revolving line of credit as current debt because it is the Company’s intention to use the line of credit to borrow and pay back funds over short periods of time.
[2] | The carrying value of the debt reflects the amounts stated in the above table less debt issuance costs of $3.5 million and $4.0 million as of June 30, 2019 and December 31, 2018, respectively, related to the Credit Agreement, which are not reflected in this table.

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 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=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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