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Fair Value Disclosures - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Available for sale securities:
Available for Sale Securities, Fair Value	$ 227,206	$ 275,029
Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Available for Sale Securities, Fair Value	227,206	275,029
Mutual Fund
Available for sale securities:
Securities available for sale	2,023	2,011
Mutual Fund | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	2,023	2,011
U.S. Government Agency Obligations
Available for sale securities:
Securities available for sale	133,805	180,942
U.S. Government Agency Obligations | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	133,805	180,942
U.S. Treasury notes | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	4,873
Mortgage-backed Securities, Residential
Available for sale securities:
Securities available for sale	22,507	24,990
Mortgage-backed Securities, Residential | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	22,507	24,990
Asset Backed Securities
Available for sale securities:
Securities available for sale	12,799	12,902
Asset Backed Securities | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	12,799	12,902
State and Municipal
Available for sale securities:
Securities available for sale	25,151	26,637
State and Municipal | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	25,151	26,637
Corporate Bonds
Available for sale securities:
Securities available for sale	25,904	27,390
Corporate Bonds | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	25,904	27,390
SBA Pooled Securities
Available for sale securities:
Securities available for sale	144	157
SBA Pooled Securities | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	144	157
Level 1 | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Available for Sale Securities, Fair Value	2,023	2,011
Level 1 | Mutual Fund | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	2,023	2,011
Level 2 | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Available for Sale Securities, Fair Value	225,183	273,018
Level 2 | U.S. Government Agency Obligations | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	133,805	180,942
Level 2 | U.S. Treasury notes | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	4,873
Level 2 | Mortgage-backed Securities, Residential | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	22,507	24,990
Level 2 | Asset Backed Securities | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	12,799	12,902
Level 2 | State and Municipal | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	25,151	26,637
Level 2 | Corporate Bonds | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	25,904	27,390
Level 2 | SBA Pooled Securities | Fair Value, Measurements, Recurring [Member]
Available for sale securities:
Securities available for sale	$ 144	$ 157

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