Junior Subordinated Debt/Trust Preferred Securities (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2009 USD ($)
Debt Instrument [Line Items]
Gains (losses) on fair value liability, before tax		$ (344,000)	$ 159,000	$ 672,000	$ (177,000)
Gains (losses) on fair value liability, after tax		(243,000)	(112,000)	473,000	(126,000)
Gain on fair value of financial liability, gross			660,000	1,451,000	1,571,000
Gain on fair value financial liability, net			465,000	1,022,000	1,107,000
Unrealized loss on junior subordinated debentures		(326,000)	(501,000)	(779,000)	(1,748,000)
Unrealized (loss) gain on junior subordinated debentures net of taxes		(230,000)	$ (353,000)	(549,000)	$ (1,233,000)
Loss on fair value of financial liability, gross		18,000
Loss on fair value of financial liability, net		13,000
Junior Subordinated Debt
Debt Instrument [Line Items]
Amount of junior subordinated debentures relating to trust preferred securities		12,000,000.0		12,000,000.0		$ 15,000,000.0
Debt instrument, repurchased face amount	$ 3,000,000.0
Fair value measurement option, gain (loss) on long-term debt instruments		$ 2,432,000		$ 2,432,000
Junior Subordinated Debt | Measurement Input, Discount Rate
Debt Instrument [Line Items]
Weighted average inputs (percent)		0.0383		0.0383
Junior Subordinated Debt | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				129.00%