Debt Term Loan (Details) $ in Thousands		3 Months Ended
	Oct. 06, 2017 USD ($) covenant	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Proceeds from Lines of Credit	$ 10,000	$ 10,000
Number of financial covenants | covenant	2
Secured debt	$ 245,000	143,187	$ 245,000
Unamortized Debt Issuance Expense		(4,102)	(7,422)
Debt, Long-term and Short-term, Combined Amount		139,085	237,578
Long-term Debt, Current Maturities		(6,918)	(10,184)
Term Loan		$ 132,167	$ 227,394
Consolidated leverage ratio, period one	5.00
Consolidated leverage ratio, period two	4.25
Consolidated leverage ratio, period three	3.50
Consolidated fixed charge coverage ratio	1.25