Long-Term Debt and Lines of Credit - Summary (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Long-term debt
Long term debt gross	$ 644,466
Less debt issuance costs	(8,672)	$ (9,965)
Total long-term debt	635,794	701,913
Less current portion of long-term debt, including accrued interest(1) of $4.1 million as of December 31, 2019	(4,628)	(8,744)
Total long-term debt, long-term portion	631,166	693,169
Accrued interest		4,100
Accrued Liabilities Current
Long-term debt
Accrued interest	300
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	$ 644,466	650,891
First lien senior secured credit facility \| Credit Facility
Long-term debt
Long term debt gross		$ 60,987

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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