Fair Value - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average capitalization rate	7.40%
Specific reserve for impaired loans	$ 35,154	$ 32,423	$ 27,122	$ 23,400
Other real estate owned and other reductions classified as level 3 transfers in	4,700
Paydowns, chargeoffs and writedowns of level 3	1,900
Additions to level 3	4,000
Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	5,100	8,600
Specific reserve for impaired loans	2,900	$ 2,700
Paydowns, chargeoffs and writedowns of level 3	400
Additions to level 3	5,500
Sales of level 3 investments	$ 5,500