Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 295,659	$ 291,759
U.S. Treasury and government sponsored entities
Schedule of Available-for-sale Securities [Line Items]
Within 1 year, amortized cost	14,997
1-5 years, amortized cost	224,896
Amortized Cost	239,893	238,116
Within 1 year, fair value	15,020
1-5 years, fair value	225,649
Total securities available for sale, fair value	$ 240,669
Within 1 year, weighted average yield	0.85%
1-5 years, weighted average yield	1.16%
Weighted Average Yield, Total	1.14%
U.S. Agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
1-5 years, amortized cost	$ 7
Amortized Cost	7	818
1-5 years, fair value	7
Total securities available for sale, fair value	$ 7
1-5 years, weighted average yield	2.20%
Weighted Average Yield, Total	2.20%
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Within 1 year, amortized cost	$ 7,103
1-5 years, amortized cost	33,719
Amortized Cost	40,822	39,049
Within 1 year, fair value	7,104
1-5 years, fair value	33,608
Total securities available for sale, fair value	$ 40,712
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	$ 4,921
Amortized Cost	4,921	3,549
Over 10 years, fair value	4,882
Total securities available for sale, fair value	$ 4,882
Over 10 years, weighted average yield	7.16%
Weighted Average Yield, Total	7.16%
Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 10,016	$ 10,227