Derivative Financial Instruments and Hedging - Schedule of Gross Notional and Fair Value Amounts of Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional values	$ 549,966	$ 612,181
Asset derivatives	11,529	7,490
Liability derivatives	2,090	3,758
Interest rate lock commitments
Derivative [Line Items]
Notional values	219,929	279,048
Asset derivatives	9,207	7,336
Liability derivatives	0	0
Forward delivery contracts
Derivative [Line Items]
Notional values	35,979	87,773
Asset derivatives	0	36
Liability derivatives	22	0
TBA mortgage backed securities
Derivative [Line Items]
Notional values	291,000	235,000
Asset derivatives	232	118
Liability derivatives	1,508	428
Other Contract
Derivative [Line Items]
Notional values	3,058	10,360
Asset derivatives	2,090	0
Liability derivatives	$ 560	$ 3,330