Equity Securities Without Readily Determinable Fair Values (Equity securities without readily determinable fair values) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Equity Method And Other Investments [Abstract]
FHLB Stock	$ 11,700	$ 11,700
FRB Stock	1,999	1,999
Other	335	338
Total	22,427	22,286
Investment in Corporate Settlement Solutions [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	7,393	7,249
Investment in Valley Financial Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 1,000	$ 1,000