Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 299,349	$ 291,759
U.S. Treasury and government sponsored entities
Schedule of Available-for-sale Securities [Line Items]
Within 1 year, amortized cost	9,998
1-5 years, amortized cost	234,807
Amortized Cost	244,805	238,116
Within 1 year, fair value	10,009
1-5 years, fair value	235,496
Total securities available for sale, fair value	$ 245,505
Within 1 year, weighted average yield	0.84%
1-5 years, weighted average yield	1.11%
Weighted Average Yield, Total	1.10%
U.S. Agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
1-5 years, amortized cost	$ 4
Amortized Cost	4	818
1-5 years, fair value	4
Total securities available for sale, fair value	$ 4
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	$ 6,613
1-5 years, amortized cost	33,744
Amortized Cost	40,357	39,049
Within 1 year, fair value	6,621
1-5 years, fair value	33,913
Total securities available for sale, fair value	$ 40,534
Within 1 year, weighted average yield	1.67%
1-5 years, weighted average yield	3.87%
Weighted Average Yield, Total	3.51%
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	5,045
Total securities available for sale, fair value	$ 5,045
Over 10 years, weighted average yield	6.41%
Weighted Average Yield, Total	6.41%