Mortgage Servicing Rights (MSR Carrying Value) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Servicing Asset at Amortized Cost [Line Items]
Mortgage servicing rights	$ 20,571,000	$ 21,633,000	$ 20,571,000	$ 21,633,000	$ 20,665,000	$ 21,396,000	$ 21,657,000	$ 21,945,000
Servicing rights originated	1,532,000	1,396,000	3,943,000	4,026,000
Amortization of Mortgage Servicing Rights (MSRs)	(1,581,000)	(1,420,000)	(4,595,000)	(4,338,000)
Valuation allowance (provision) reversal	$ 45,000.0	$ 0	$ 173,000	$ 0