Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value hierarchy - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Financial assets
Cash and cash equivalents, Carrying Amount	$ 158,521	$ 126,847	$ 138,013	$ 82,692
Cash and cash equivalents, Fair Value	158,521	126,847
Investment securities available-for-sale	224,214	289,532
Investment securities available-for-sale	224,214	289,532
Investment securities held-to-maturity, Carrying Amount	227,221	224,682
Investment securities held-to-maturity, Fair Value	234,493	231,445
Investments in restricted stock, at cost, Carrying Amount	$ 30,362	$ 23,535
Investments in restricted stock, at cost, Fair Value
Loans held for sale	$ 990
Loans held for sale	990
Net loans, Carrying Amount	2,931,848	$ 2,524,481
Net loans, Fair Value	2,929,939	2,538,415
Derivatives		48
Derivatives		48
Accrued interest receivable, Carrying Amount	11,662	11,700
Accrued interest receivable, Fair Value	11,662	11,700
Financial liabilities
Noninterest-bearing deposits, Carrying Amount	586,643	492,515
Noninterest-bearing deposits, Fair Value	586,643	492,516
Interest-bearing deposits, Carrying Amount	2,079,981	1,983,092
Interest-bearing deposits, Fair Value	2,084,440	1,990,484
Borrowings, Carrying Amount	621,674	495,553
Borrowings, Fair Value	627,399	505,641
Subordinated debentures, Carrying Amount	55,155	5,155
Subordinated debentures, Fair Value	55,007	4,768
Derivatives	1,105
Derivatives	1,105
Accrued interest payable, Carrying Amount	5,198	3,930
Accrued interest payable, Fair Value	5,198	3,930
Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and cash equivalents, Fair Value	158,521	126,847
Investment securities available-for-sale	16,023	13,199
Investment securities held-to-maturity, Fair Value	$ 29,747	$ 29,184
Investments in restricted stock, at cost, Fair Value
Accrued interest receivable, Fair Value	$ 221	$ 68
Financial liabilities
Noninterest-bearing deposits, Fair Value	586,643	492,516
Fair Value, Inputs, Level 2 [Member]
Financial assets
Investment securities available-for-sale	208,191	276,333
Investment securities held-to-maturity, Fair Value	$ 186,133	$ 183,489
Investments in restricted stock, at cost, Fair Value
Loans held for sale	$ 990
Derivatives		$ 48
Accrued interest receivable, Fair Value	2,631	3,674
Financial liabilities
Interest-bearing deposits, Fair Value	2,084,440	1,990,484
Borrowings, Fair Value	627,399	505,641
Subordinated debentures, Fair Value	55,007	4,768
Derivatives	1,105
Accrued interest payable, Fair Value	5,198	3,930
Fair Value, Inputs, Level 3 [Member]
Financial assets
Investment securities held-to-maturity, Fair Value	$ 18,613	$ 18,772
Investments in restricted stock, at cost, Fair Value
Net loans, Fair Value	$ 2,929,939	$ 2,538,415
Accrued interest receivable, Fair Value	$ 8,810	$ 7,958