Loans Loans - Internal Credit Assessment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	$ 2,909,342	$ 2,919,981
Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	8,195	6,164
Consumer Portfolio
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	523,000	633,464
Consumer Portfolio | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	521,850	632,670
Consumer Portfolio | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	1,150	794
Consumer Portfolio | Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	208,728	313,849
Consumer Portfolio | Residential mortgage | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	207,686	313,088
Consumer Portfolio | Residential mortgage | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	1,042	761
Consumer Portfolio | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	22,640	24,306
Consumer Portfolio | Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	22,640	24,306
Consumer Portfolio | Home equity | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	0	0
Consumer Portfolio | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	291,632	295,309
Consumer Portfolio | Other consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	291,524	295,276
Consumer Portfolio | Other consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Receivable	$ 108	$ 33