Fair Value - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average capitalization rate	7.30%
Specific reserve for impaired loans	$ 92,733	$ 35,154	$ 32,423	$ 27,122
Additions to level 3, loans	11,900
Paydowns and chargeoffs to level 3, loans	(8,700)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned and other reductions classified as level 3 transfers in	4,500
Other real estate owned, sales of level 3 investments	4,900
Other real estate owned, paydowns, chargeoffs and writedowns of level 3	1,600
Other real estate owned, additions to level 3	2,600
Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	8,800	5,100
Specific reserve for impaired loans	$ 7,700	$ 2,900