Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred tax liability, net	$ 27,255		$ 27,255		$ 21,930
Operating Loss Carryforwards	2,500		2,500
Tax Credit Carryforward, Amount	2,000		2,000
Net operating loss carryforwards, valuation allowance	1,100		1,100
Gross unrecognized tax benefits	3,100		$ 3,100
Effective income tax rate on unrecognized tax benefits that would impact effective tax rate			0.50%
Recognized benefit in interest	5		$ 30
Accrued interest related to unrecognized tax benefits	$ 383		$ 383
Effective Income Tax Rate Reconciliation, Percent	24.70%	35.80%	24.30%	36.20%