Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial instruments with Off-Balance Sheet Credit Risk

The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment.

	December 31,
	2019		2018
Commitments to extend credit, excluding interest rate lock commitments	$	1,086,173	$	1,032,390
Letters of credit	19,569		19,024
Balance at end of period	$	1,105,742	$	1,051,414

Summary of Allowance for Loan Repurchases or Indemnifications

The following table summarizes the activity in the repurchase reserve:

	For the Year Ended December 31,
	2019			2018			2017
Balance at beginning of period	$	3,273		$	3,386		$	2,659
Provision for loan repurchases or indemnifications	362			174			810
Recoveries on previous losses	(106		)	3			—
Losses on loans repurchased or indemnified	—			(290		)	(83		)
Balance at end of period	$	3,529		$	3,273		$	3,386