Fair Value of Assets & Liabilities - Gains/(losses) on Nonrecurring Fair Value Measurements (Details) - Non Recurring - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans, net of unearned income	$ (4,639)	$ 665	$ (4,436)	$ 1,167
Net gains/(losses), Real estate acquired by foreclosure	(9)	(262)	26	(1,422)
Net gains/(losses), Other assets	(267)	(1,079)	(942)	(2,216)
Gain (loss) on financial assets measured on non-recurring basis	(5,979)	(2,102)	(6,620)	(4,454)
First Mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans held for sale	10	(1)	25	4
SBAs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains/(losses), Loans held for sale	$ (1,074)	$ (1,425)	$ (1,293)	$ (1,987)