Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Recent Accounting Pronouncements [Abstract]
Retained earnings		$ 678,611	$ 696,214
Allowance for credit losses	[1]	100,000
ASU 2016-13 [Member]
Recent Accounting Pronouncements [Abstract]
Allowance for credit losses		$ 100,000	75,999
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Recent Accounting Pronouncements [Abstract]
Retained earnings			(4,300)
Allowance for credit losses			3,000
Allowance for credit losses on off-balance sheet credit exposure			2,800
Deferred tax asset			$ (1,500)

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.