Investment Securities, Securities Available-for-Sale (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost		$ 502,693	$ 499,639
Gross unrealized gains		4,905	1,208
Gross unrealized losses		212	5,451
Fair value		507,386	495,396
Government Agency & Government-Sponsored Entities [Member]
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost			3,033
Gross unrealized gains			6
Gross unrealized losses			0
Fair value			3,039
US Treasury Notes [Member]
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost		54,745	164,672
Gross unrealized gains		250	0
Gross unrealized losses		0	158
Fair value		54,995	164,514
US Government Agency SBA [Member]
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost		10,902	15,601
Gross unrealized gains		9	6
Gross unrealized losses		113	160
Fair value		10,798	15,447
Mortgage Backed Securities [Member]
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost	[1]	436,531	310,982
Gross unrealized gains	[1]	4,646	1,196
Gross unrealized losses	[1]	99	5,133
Fair value	[1]	441,078	307,045
Other [Member]
Amortized cost, fair values, and unrealized gains and losses of securities available-for-sale [Abstract]
Amortized cost		515	5,351
Gross unrealized gains		0	0
Gross unrealized losses		0	0
Fair value		$ 515	$ 5,351

[1] All Mortgage Backed Securities were issued by an agency or government sponsored entity of the U.S. government.