Fair Value - Summary of Reconciliation of all Assets Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Level 3) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Construction Loans Held for Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets at beginning of period	$ 75,739
Total gains (losses) for the period, Included in change in fair value of loans held for sale	4,012	$ 11,213
Originations	40,767	83,032
Acquired in acquisition		37,711
Sales	(8,496)	(19,934)
Balance of recurring Level 3 assets at end of period	$ 112,022	112,022
Securities Available-For-Sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets at beginning of period		3,411
Balance of Level 3 assets moved to Level 2 during the period		$ (3,411)