Long-Term Debt and Lines of Credit - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-term debt
Long term debt gross	$ 718,290
Less debt issuance costs	(10,619)	$ (12,985)
Total long-term debt	707,671	684,056
Less current portion of long-term debt	(5,618)	(7,191)
Total long-term debt, long-term portion	702,053	676,865
Senior Secured Credit Facilities \| Term loan
Long-term debt
Face amount of debt	665,000
Senior Secured Credit Facilities \| Credit Facility
Long-term debt
Commitments	200,000
First lien senior secured credit facility \| Term loan
Long-term debt
Long term debt gross	649,794	654,775
First lien senior secured credit facility \| Credit Facility
Long-term debt
Long term debt gross	$ 68,496	$ 42,266

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.

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