Schedule I - Condensed Financial Information of the Registrant (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Jan. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Long-term Debt, Total		$ 524,727	$ 527,883
Write off of Deferred Debt Issuance Cost			3,876	$ 3,294
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition		$ 685	$ 774
Common Stock, Shares, Issued, Total		35,534,558	35,353,296
Management [Member]
Common Stock, Shares, Issued, Total	170,712
Parent Company [Member]
Write off of Deferred Debt Issuance Cost			$ 3,037
APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition		$ 9,000	10,900
Adjustments To Additional Paid In Capital Initial Public Offering			$ 4,800
Shares and Related Proceeds from IPO Reclassified from Other Long-term Liabilities to APIC	$ 1,300
Parent Company [Member] | Management [Member]
Common Stock, Shares, Issued, Total	170,712
Payment in Kind (PIK) Note [Member] | Parent Company [Member]
Debt Instrument, Interest Rate, Stated Percentage	11.25%
Extinguishment of Debt, Amount	$ 152,600
Long-term Debt, Total	115,000
Debt Instrument, Accrued Interest	1,400
Write off of Deferred Debt Issuance Cost	$ 3,000