Investment Securities, Debt Securities by Credit Rating (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Available-for-sale [Abstract]
Fair value		$ 225,338	$ 270,454
Held-to-Maturity [Abstract]
Amortized cost		867,990	737,052
AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		4,738
Held-to-Maturity [Abstract]
Amortized cost		19,271
BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		4,788
Held-to-Maturity [Abstract]
Amortized cost		149
Not Rated [Member]
Available-for-sale [Abstract]
Fair value		215,812
Held-to-Maturity [Abstract]
Amortized cost		848,963
U.S. Treasury Notes [Member]
Available-for-sale [Abstract]
Fair value		4,952	10,089
U.S. Treasury Notes [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
U.S. Treasury Notes [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
U.S. Treasury Notes [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value		4,952
Held-to-Maturity [Abstract]
Amortized cost		0
U.S. Government-sponsored Securities [Member]
Available-for-sale [Abstract]
Fair value		5,441	6,374
U.S. Government-sponsored Securities [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
U.S. Government-sponsored Securities [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
U.S. Government-sponsored Securities [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value		5,441
Held-to-Maturity [Abstract]
Amortized cost		0
Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Fair value	[1]	203,607	251,120
Mortgage-backed Securities [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value	[2]	0
Held-to-Maturity [Abstract]
Amortized cost	[2]	0
Mortgage-backed Securities [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value	[2]	0
Held-to-Maturity [Abstract]
Amortized cost	[2]	0
Mortgage-backed Securities [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value	[2]	203,607
Held-to-Maturity [Abstract]
Amortized cost	[2]	721,510
Collateralized Mortgage Obligations [Member]
Available-for-sale [Abstract]
Fair value	[1]	1,502	2,436
Collateralized Mortgage Obligations [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value	[2]	0
Held-to-Maturity [Abstract]
Amortized cost	[2]	0
Collateralized Mortgage Obligations [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value	[2]	0
Held-to-Maturity [Abstract]
Amortized cost	[2]	0
Collateralized Mortgage Obligations [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value	[2]	1,502
Held-to-Maturity [Abstract]
Amortized cost	[2]	84,414
Municipal Securities [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		19,271
Municipal Securities [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		149
Municipal Securities [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		43,039
Corporate Securities [Member]
Available-for-sale [Abstract]
Fair value		9,526
Corporate Securities [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		4,738
Held-to-Maturity [Abstract]
Amortized cost		0
Corporate Securities [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		4,788
Held-to-Maturity [Abstract]
Amortized cost		0
Corporate Securities [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
Other [Member]
Available-for-sale [Abstract]
Fair value		310	$ 435
Other [Member] | AAA/AA/A Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
Other [Member] | BBB/BB/B Rating [Member]
Available-for-sale [Abstract]
Fair value		0
Held-to-Maturity [Abstract]
Amortized cost		0
Other [Member] | Not Rated [Member]
Available-for-sale [Abstract]
Fair value		310
Held-to-Maturity [Abstract]
Amortized cost		$ 0

[1] All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.

[2] All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. government.