Fair Value (Fair Value Measurement and Assumptions) (Details) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) loan	Dec. 31, 2018 USD ($)
Assets:
Impaired Loans	$ 10,666		$ 10,666	$ 14,306
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Charges to allowance for probable loan losses in connection with other real estate owned	33	$ 9,500	$ 9,533	170
Number of loan foreclosures | loan			1
Adjustment to fair value in connection with other real estate owned	66		$ 154	3,071
Impaired commercial collateral dependent loans	10,666		10,666	14,306
Impaired commercial collateral dependent receivables appraisals to determine fair value within immediately preceding twelve months	7,184		7,184	10,911
Impaired collateral dependent commercial loans with internal evaluation completed within last twelve months	1,490		1,490	0
Measured on a non-recurring basis
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Change in net provision, impaired loans	189		189	356
Change in net provision, other real estate owned	154		154	3,071
Change in net provision, equity investment without readily determinable fair value	4,775		4,775
Measured on a non-recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Impaired Loans	914		914	1,563
Equity investments without readily determinable fair values	28,166		28,166
Non-financial assets:
Other real estate owned	27,376		27,376	38,871
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Impaired commercial collateral dependent loans	914		914	1,563
Measured on a non-recurring basis | Assets/liabilities measured at fair value
Assets:
Impaired Loans	914		914	1,563
Equity investments without readily determinable fair values	28,166		28,166
Non-financial assets:
Other real estate owned	27,376		27,376	38,871
Assumptions used in discounted cash flow model to determine fair value of investments classified within level 3
Impaired commercial collateral dependent loans	$ 914		$ 914	$ 1,563