Securities (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($) Security	Sep. 30, 2019 USD ($) Security		Sep. 30, 2020 USD ($) Security	Sep. 30, 2019 USD ($)		Dec. 31, 2019 USD ($)
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 968,038			$ 968,038			$ 513,668
Unrealized Gains	18,899			18,899			5,782
Unrealized Losses	1,887			1,887			1,050
Fair Value	985,050			985,050			518,400
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	155,790			155,790			130,648
Less Than Twelve Months, Unrealized Losses	1,263			1,263			535
Twelve Months or More, Fair Value	30,292			30,292			38,343
Twelve Months or More, Unrealized Losses	624			624			515
Total, Fair Value	186,082			186,082			168,991
Total, Unrealized Losses	1,887			1,887			1,050
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	939			939
Amortized cost	754			754
Non-credit unrealized loss	0			0
Unrealized gain	185			185
Cumulative credit related OTTI	1,214			1,214
Credit related OTTI recognized in earnings	0	$ 0		0	$ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at beginning of period	1,214	1,594		1,214	1,594
Additions to credit losses on securities for which no previous OTTI was recognized	0	0		0	0
Increases to credit losses on securities for which OTTI was previously recognized	0	0		0	0
Reduction	0	(380)	[1]	0	(380)	[1]
Balance at end of period	1,214	$ 1,214		1,214	$ 1,214
Number of securities settled which were recorded under OTTI | Security		1
U.S. Agency [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	10,820			10,820			14,591
Unrealized Gains	332			332			89
Unrealized Losses	22			22			19
Fair Value	11,130			11,130			14,661
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	1,788			1,788			2,782
Less Than Twelve Months, Unrealized Losses	5			5			8
Twelve Months or More, Fair Value	2,262			2,262			2,712
Twelve Months or More, Unrealized Losses	17			17			11
Total, Fair Value	4,050			4,050			5,494
Total, Unrealized Losses	$ 22			$ 22			19
Number of securities with market fair value less than amortized cost | Security	27			27
U.S. Agency Residential Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 330,914			$ 330,914			226,130
Unrealized Gains	5,167			5,167			1,910
Unrealized Losses	521			521			278
Fair Value	335,560			335,560			227,762
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	81,400			81,400			56,377
Less Than Twelve Months, Unrealized Losses	519			519			126
Twelve Months or More, Fair Value	1,298			1,298			13,551
Twelve Months or More, Unrealized Losses	2			2			152
Total, Fair Value	82,698			82,698			69,928
Total, Unrealized Losses	$ 521			$ 521			278
Number of securities with market fair value less than amortized cost | Security	39			39
U.S. Agency Commercial Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 8,039			$ 8,039			10,671
Unrealized Gains	382			382			113
Unrealized Losses	0			0			28
Fair Value	8,421			8,421			10,756
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value							3,284
Less Than Twelve Months, Unrealized Losses							24
Twelve Months or More, Fair Value							659
Twelve Months or More, Unrealized Losses							4
Total, Fair Value							3,943
Total, Unrealized Losses							28
Private Label Mortgage-Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	43,190			43,190			39,248
Unrealized Gains	1,415			1,415			544
Unrealized Losses	320			320			99
Fair Value	44,285			44,285			39,693
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	14,269			14,269			16,387
Less Than Twelve Months, Unrealized Losses	268			268			55
Twelve Months or More, Fair Value	749			749			343
Twelve Months or More, Unrealized Losses	52			52			44
Total, Fair Value	15,018			15,018			16,730
Total, Unrealized Losses	$ 320			$ 320			99
Number of securities with market fair value less than amortized cost | Security	20			20
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Number of private label mortgage backed securities currently with OTTI unrealized gains | Security	2			2
Senior Security [Member]
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	$ 403			$ 403
Amortized cost	386			386
Non-credit unrealized loss	0			0
Unrealized gain	17			17
Cumulative credit related OTTI	757			757
Super Senior Security [Member]
Private Label Mortgage Backed Securities Below Investment Grade [Abstract]
Fair value	536			536
Amortized cost	368			368
Non-credit unrealized loss	0			0
Unrealized gain	168			168
Cumulative credit related OTTI	457			457
Other Asset Backed [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	262,435			262,435			94,158
Unrealized Gains	1,392			1,392			103
Unrealized Losses	456			456			375
Fair Value	263,371			263,371			93,886
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	28,630			28,630			34,027
Less Than Twelve Months, Unrealized Losses	129			129			233
Twelve Months or More, Fair Value	22,210			22,210			13,839
Twelve Months or More, Unrealized Losses	327			327			142
Total, Fair Value	50,840			50,840			47,866
Total, Unrealized Losses	$ 456			$ 456			375
Number of securities with market fair value less than amortized cost | Security	55			55
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 238,479			$ 238,479			94,499
Unrealized Gains	6,635			6,635			1,724
Unrealized Losses	136			136			121
Fair Value	244,978			244,978			96,102
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	19,075			19,075			15,666
Less Than Twelve Months, Unrealized Losses	110			110			84
Twelve Months or More, Fair Value	2,003			2,003			5,396
Twelve Months or More, Unrealized Losses	26			26			37
Total, Fair Value	21,078			21,078			21,062
Total, Unrealized Losses	$ 136			$ 136			121
Number of securities with market fair value less than amortized cost | Security	26			26
Corporate [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 71,691			$ 71,691			31,904
Unrealized Gains	3,558			3,558			1,296
Unrealized Losses	232			232			5
Fair Value	75,017			75,017			33,195
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	10,628			10,628			2,125
Less Than Twelve Months, Unrealized Losses	232			232			5
Twelve Months or More, Fair Value	0			0			0
Twelve Months or More, Unrealized Losses	0			0			0
Total, Fair Value	10,628			10,628			2,125
Total, Unrealized Losses	$ 232			$ 232			5
Number of securities with market fair value less than amortized cost | Security	12			12
Trust Preferred [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	$ 1,970			$ 1,970			1,968
Unrealized Gains	0			0			0
Unrealized Losses	200			200			125
Fair Value	1,770			1,770			1,843
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less Than Twelve Months, Fair Value	0			0			0
Less Than Twelve Months, Unrealized Losses	0			0			0
Twelve Months or More, Fair Value	1,770			1,770			1,843
Twelve Months or More, Unrealized Losses	200			200			125
Total, Fair Value	1,770			1,770			1,843
Total, Unrealized Losses	$ 200			$ 200			125
Number of securities with market fair value less than amortized cost | Security	2			2
Number of issues rated as investment grade | Security	1			1
Number of securities not rated | Security	1			1
Non-rated securities, amortized cost	$ 1,000			$ 1,000
Fair value of non-rated trust preferred securities	850			850
Foreign Government [Member]
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Amortized cost	500			500			499
Unrealized Gains	18			18			3
Unrealized Losses	0			0			0
Fair Value	$ 518			$ 518			$ 502

[1] During the third quarter of 2019 one security with previously recorded OTTI was settled and balance is now zero.