Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 289,444	$ 291,759
U.S. Treasury and government sponsored entities
Schedule of Available-for-sale Securities [Line Items]
Within 1 year, amortized cost	9,996
1-5 years, amortized cost	224,392
Amortized Cost	234,388	238,116
Within 1 year, fair value	10,015
1-5 years, fair value	225,421
Total securities available for sale, fair value	$ 235,436
Within 1 year, weighted average yield	0.84%
1-5 years, weighted average yield	1.14%
Weighted Average Yield, Total	1.12%
U.S. Agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
1-5 years, amortized cost	$ 6
Amortized Cost	6	818
1-5 years, fair value	6
Total securities available for sale, fair value	$ 6
1-5 years, weighted average yield	1.47%
Weighted Average Yield, Total	1.47%
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Within 1 year, amortized cost	$ 7,106
1-5 years, amortized cost	33,732
Amortized Cost	40,838	39,049
Within 1 year, fair value	7,117
1-5 years, fair value	33,768
Total securities available for sale, fair value	$ 40,885
Within 1 year, weighted average yield	1.44%
1-5 years, weighted average yield	1.39%
Weighted Average Yield, Total	1.40%
Preferred stock
Schedule of Available-for-sale Securities [Line Items]
Over 10 years, amortized cost	$ 4,922
Amortized Cost	4,922	$ 3,549
Over 10 years, fair value	4,933
Total securities available for sale, fair value	$ 4,933
Over 10 years, weighted average yield	7.16%
Weighted Average Yield, Total	7.16%