Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Financial Instruments with Off-Balance Sheet Credit Risk

	December 31,
	2021		2020
Commitments to extend credit, excluding interest rate lock commitments	$	3,106,594	$	2,719,996
Letters of credit	77,427		67,598
Balance at end of period	$	3,184,021	$	2,787,594

Schedule of Allowance of Credit Losses on Unfunded Commitments

The table below presents activity within the allowance for credit losses on unfunded commitments included in accrued expenses and other liabilities on the Company's consolidated balance sheets for the years ended December 31, 2021 and 2020:

	Year Ended December 31,
	2021		2020
Balance at beginning of period	$	16,378	$	—
Impact of CECL adoption on provision for credit losses on unfunded commitments	—		2,947
Increase in provision for credit losses from unfunded commitments acquired in business combination	—		10,499
Provision for credit losses on unfunded commitments	(1,998)		2,932
Balance at end of period	$	14,380	$	16,378

Schedule of Activity in the Repurchase Reserve

The following table summarizes the activity in the repurchase reserve included in accrued expenses and other liabilities on the Company's consolidated balance sheets:

	Year Ended December 31,
	2021		2020		2019
Balance at beginning of period	$	5,928	$	3,529	$	3,273
Provision for loan repurchases or indemnifications	(766)		2,607		362
Losses on loans repurchased or indemnified	(360)		(208)		(106)
Balance at end of period	$	4,802	$	5,928	$	3,529