Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Common Stock Par Or Stated Value Per Share	$ 0.01		$ 0.01
County First Acquisition [Member]
Subsequent Event [Line Items]
Business Acquisition, Share Price		$ 2.20
Business Acquisition, Share Price, Cash Consideration		1.00
Business Acquisition, Share Price, Contingent Cash Consideration		1.20
Payments to Acquire Businesses, Gross	$ 2,122
Business Combination, Consideration Transferred	37,742
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 227,687
Common Class A [Member]
Subsequent Event [Line Items]
Share Price		$ 38.78