Fair Value - Carrying Value of Mortgage Servicing Rights (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance		$ 6,228	$ 6,468	$ 6,730	$ 5,894
New MSRs		204	393	457	569
Total gains (losses) included in earnings:
Changes in valuation inputs and assumptions	[1]	(389)	2	(989)	562
Other changes in fair value	[1],[2]	(212)	(192)	(367)	(354)
Ending balance	[3]	5,831	6,671	5,831	6,671
Contractually servicing fees earned	[1]	$ 390	$ 369	$ 771	$ 747

[1] Included in mortgage banking income in the Condensed Consolidated Statements of Income and related to assets held as of June 30, 2019 and 2018.

[2] Primarily represents changes in expected future cash flows due to payoffs and paydowns.

[3] Included in other assets in the Consolidated Statements of Financial Condition.