Business Combinations (Details) (USD $)	3 Months Ended		12 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Jan. 16, 2014	Nov. 07, 2014
Business combinations
Merger and acquisition expense	$ 468,000	$ 3,212,000	$ 5,800,000	$ 464,000
Assets acquired:
Goodwill	35,007,000		35,007,000
UFBC Capital Trust I
Business combinations
Additional amount payable for unfunded capital investment					155,000
Not primary beneficiary | UFBC Capital Trust I
Business combinations
Trust preferred securities issued					5,000,000
Not primary beneficiary | UFBC Capital Trust I | LIBOR
Business combinations
Interest rate basis					LIBOR
Basis spread on variable rate (as a percent)					2.10%
UFBC
Business combinations
Total assets acquired					356,123,000
Cash paid to UFBC shareholders in exchange for each share of UFBC common stock (in dollars per share)					19.13
Number of Company shares offered to UFBC shareholders in exchange for each share of UFBC common stock					1.154
Total purchase price					54,287,000
Cash consideration					26,800,000
Number of shares of the entity's common stock issued					1,600,000
Assets acquired:
Cash and cash equivalents					63,313,000
Investment securities available-for-sale					16,278,000
Loans					238,272,000
Premises and equipment					7,652,000
Accrued interest receivable					522,000
Goodwill					24,706,000
Other intangible assets					2,740,000
Other assets					2,640,000
Total assets acquired					356,123,000
Deposits:
Non-interest bearing					90,206,000
Savings, NOW and money market					131,312,000
Certificates of deposit					73,686,000
Total deposits					295,204,000
Junior subordinated debentures issued to Trust					3,679,000
Other liabilities					2,953,000
Total liabilities assumed					301,836,000
Total consideration paid					54,287,000
Number of categories available for segregating acquired loan portfolio					2
Number of segregated categories chosen for acquired loan portfolio					1
UFBC | Maximum
Deposits:
Number of years fair value estimates are subject to change	1 year
UFBC | CDI
Deposits:
Threshold amount of certificates of deposit excluded from core deposit intangibles	250,000
Estimated useful life	6 years 8 months 12 days
Gainesville Branch Acquisition
Business combinations
Total assets acquired						66,283,000
Total purchase price						195,000
Assets acquired:
Cash and cash equivalents						65,786,000
Goodwill						157,000
Other intangible assets						340,000
Total assets acquired						66,283,000
Deposits:
Non-interest bearing						4,234,000
Savings, NOW and money market						9,859,000
Certificates of deposit						50,528,000
Total deposits						64,621,000
Other liabilities						1,467,000
Total liabilities assumed						66,088,000
Total consideration paid						195,000
Number of customer repurchase agreements in other borrowed funds	1
Gainesville Branch Acquisition | Minimum
Deposits:
Minimum number of maturity days for customer repurchase agrements	1 day
Gainesville Branch Acquisition | Maximum
Deposits:
Maximum number of maturity days for customer repurchase agreements	4 days
Gainesville Branch Acquisition | CDI
Deposits:
Threshold amount of certificates of deposit excluded from core deposit intangibles	$ 250,000
Estimated useful life	5 years 10 months 24 days