Commitments and contingencies (Tables)

3 Months Ended

Mar. 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.

	March 31,		December 31,
	2019		2018
Commitments to extend credit, excluding interest rate lock commitments	$	1,111,472	$	1,032,390
Letters of credit	18,762		19,024
Balance at end of period	$	1,130,234	$	1,051,414

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
	2019		2018
Balance at beginning of period	$	3,273	$	3,386
Provision for loan repurchases or indemnifications	59		186
Recoveries on previous losses	—		(58		)
Balance at end of period	$	3,332	$	3,514