Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating lease right-of-use assets	$ 28,900
Operating lease liabilities	30,900
Rent-related liabilities	2,900
Reduction of deferred tax assets	222
Cumulative effect adjustment (net of taxes) on beginning retained earnings	722
Held to maturity securities amortized cost	10,415	$ 12,541
Held to maturity securities fair value	10,316	12,721
Held to Matruity securities unrealized losses	$ (99)	$ 0