Fair Value Measurements (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Fair value measurements
Fair value carrying amount		$ 9,351	$ 12,885
Mortgages held for sale reported at fair value
Fair value measurements
Fair value carrying amount		9,351	12,885
Aggregate unpaid principal		7,733	11,045
Excess of fair value carrying amount over (under) unpaid principal	[1]	$ 1,618	$ 1,840

[1] The excess of fair value carrying amount over (under) unpaid principal is included in mortgage banking income and includes changes in fair value at and subsequent to funding and gains and losses on the related loan commitment prior to funding.