Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015
ScheduleOfAvailableForSaleSecuritiesLineItems
Available-for-sale securities, Amortized Cost	$ 205,266	$ 212,284
Available-for-sale securities, Gross Unrealized Gains	1,892	733
Available-for-sale securities, Gross Unrealized Losses	423	852
Available-for-sale securities, Estimated Fair Value	206,735	212,165
Held-to-maturity securities, Amortized Cost	3,996	4,191
Held-to-maturity securities, Gross Unrealized Gains	121	112
Held-to-maturity securities, Gross Unrealized Losses	9	60
Held-to-maturity securities, Estimated Fair Value	4,108	4,243
US Treasury Securities [Member]
ScheduleOfAvailableForSaleSecuritiesLineItems
Available-for-sale securities, Amortized Cost	5,045	5,078
Available-for-sale securities, Gross Unrealized Gains	5	1
Available-for-sale securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Estimated Fair Value	5,050	5,079
US Government Corporations and Agencies Securities [Member]
ScheduleOfAvailableForSaleSecuritiesLineItems
Available-for-sale securities, Amortized Cost	49,490	49,630
Available-for-sale securities, Gross Unrealized Gains	163	89
Available-for-sale securities, Gross Unrealized Losses	145	190
Available-for-sale securities, Estimated Fair Value	49,508	49,529
Held-to-maturity securities, Amortized Cost	2,380	2,575
Held-to-maturity securities, Gross Unrealized Gains	0	0
Held-to-maturity securities, Gross Unrealized Losses	9	60
Held-to-maturity securities, Estimated Fair Value	2,371	2,515
US States and Political Subdivisions Debt Securities [Member]
ScheduleOfAvailableForSaleSecuritiesLineItems
Held-to-maturity securities, Amortized Cost	1,616	1,616
Held-to-maturity securities, Gross Unrealized Gains	121	112
Held-to-maturity securities, Gross Unrealized Losses	0	0
Held-to-maturity securities, Estimated Fair Value	1,737	1,728
Collateralized Mortgage Backed Securities [Member]
ScheduleOfAvailableForSaleSecuritiesLineItems
Available-for-sale securities, Amortized Cost	150,090	156,939
Available-for-sale securities, Gross Unrealized Gains	1,713	639
Available-for-sale securities, Gross Unrealized Losses	278	662
Available-for-sale securities, Estimated Fair Value	151,525	156,916
Equity Securities [Member]
ScheduleOfAvailableForSaleSecuritiesLineItems
Available-for-sale securities, Amortized Cost	641	637
Available-for-sale securities, Gross Unrealized Gains	11	4
Available-for-sale securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Estimated Fair Value	652	$ 641
Held-to-maturity securities, Amortized Cost	0
Held-to-maturity securities, Estimated Fair Value	$ 0

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
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