Investment Securities - Investment Category and Length of Time (Details) $ in Thousands	Mar. 31, 2016 USD ($) investment_security	Dec. 31, 2015 USD ($) investment_security	Mar. 31, 2015 USD ($) investment_security
Less than 12 months
Number \| investment_security		72
Fair Value		$ 130,105
Gross Unrealized Holding Losses		$ (993)
12 months or Longer
Number \| investment_security		9
Fair Value		$ 16,284
Gross Unrealized Holding Losses		$ (468)
Total
Number \| investment_security		81
Fair Value		$ 146,389
Gross Unrealized Holding Losses		$ (1,461)
Less than 12 months
Number \| investment_security	24	71	58
Fair Value	$ 38,858	$ 121,775	$ 42,675
Gross Unrealized Holding Losses	$ (177)	$ (923)	$ (245)
12 months or Longer
Number \| investment_security	7	9	6
Fair Value	$ 22,444	$ 16,284	$ 16,184
Gross Unrealized Holding Losses	$ (335)	$ (468)	$ (387)
Total
Number \| investment_security	31	80	64
Fair Value	$ 61,302	$ 138,059	$ 58,859
Gross Unrealized Holding Losses	(512)	$ (1,391)	$ (632)
Less than 12 months
Number \| investment_security		1
Fair Value		$ 8,330
Gross Unrealized Holding Losses		$ (70)
12 months or Longer
Number \| investment_security		0
Fair Value		$ 0
Gross Unrealized Holding Losses		$ 0
Total
Number \| investment_security		1
Fair Value		$ 8,330
Gross Unrealized Holding Losses	$ 0	$ (70)
Municipal bonds
Less than 12 months
Number \| investment_security	12	32	48
Fair Value	$ 6,251	$ 15,516	$ 20,818
Gross Unrealized Holding Losses	$ (28)	$ (61)	$ (179)
12 months or Longer
Number \| investment_security	0	6	3
Fair Value	$ 0	$ 3,349	$ 1,073
Gross Unrealized Holding Losses	$ 0	$ (36)	$ (13)
Total
Number \| investment_security	12	38	51
Fair Value	$ 6,251	$ 18,865	$ 21,891
Gross Unrealized Holding Losses	$ (28)	$ (97)	$ (192)
Collateralized mortgage obligation
Less than 12 months
Number \| investment_security	2	5	1
Fair Value	$ 9,318	$ 22,771	$ 4,622
Gross Unrealized Holding Losses	$ (9)	$ (183)	$ 0
12 months or Longer
Number \| investment_security	0	0	0
Fair Value	$ 0	$ 0	$ 0
Gross Unrealized Holding Losses	$ 0	$ 0	$ 0
Total
Number \| investment_security	2	5	1
Fair Value	$ 9,318	$ 22,771	$ 4,622
Gross Unrealized Holding Losses	$ (9)	$ (183)	$ 0
Mortgage-backed securities
Less than 12 months
Number \| investment_security	10	34	9
Fair Value	$ 23,289	$ 83,488	$ 17,235
Gross Unrealized Holding Losses	$ (140)	$ (679)	$ (66)
12 months or Longer
Number \| investment_security	7	3	3
Fair Value	$ 22,444	$ 12,935	$ 15,111
Gross Unrealized Holding Losses	$ (335)	$ (432)	$ (374)
Total
Number \| investment_security	17	37	12
Fair Value	$ 45,733	$ 96,423	$ 32,346
Gross Unrealized Holding Losses	(475)	$ (1,111)	$ (440)
Less than 12 months
Number \| investment_security		1
Fair Value		$ 8,330
Gross Unrealized Holding Losses		$ (70)
12 months or Longer
Number \| investment_security		0
Fair Value		$ 0
Gross Unrealized Holding Losses		$ 0
Total
Number \| investment_security		1
Fair Value		$ 8,330
Gross Unrealized Holding Losses	$ 0	$ (70)

Available-For-Sale And Held-To-Maturity Securities, 12 Months Or Longer [Abstract]

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