Commitments and contingencies (Tables)

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial instruments with Off-Balance Sheet Credit Risk

	March 31		December 31
	2020		2019
Commitments to extend credit, excluding interest rate lock commitments	$	1,154,092	$	1,086,173
Letters of credit	20,080		19,569
Balance at end of period	$	1,174,172	$	1,105,742

Summary of Allowance of Credit Losses on Unfunded Commitments

The table below presents activity within the allowance for credit losses on unfunded commitments:

	For the Three Months Ended March 31,
	2020
Balance at beginning of period	$	—
Impact of CECL adoption on provision for credit losses on unfunded commitments	2,947
Increase from unfunded commitments acquired in business combination	70
Provision for credit losses on unfunded commitments	1,601
Balance at end of period	$	4,618

Summary of Allowance for Loan Repurchases or Indemnifications

The following table summarizes the activity in the repurchase reserve:

	For the Three Months Ended March 31,
	2020			2019
Balance at beginning of period	$	3,529		$	3,273
Provision for loan repurchases or indemnifications	372			59
Recoveries on previous losses	(72		)	—
Balance at end of period	$	3,829		$	3,332