Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value hierarchy - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Financial assets
Cash and cash equivalents, Carrying Amount	$ 233,794	$ 200,895	$ 158,521	$ 126,847
Cash and cash equivalents, Fair Value	233,794	200,895
Investment securities available-for-sale, Carrying Amount	338,459	195,770
Investment Securities Available-for-Sale, Fair Value	338,459	195,770
Investment securities held-to-maturity, Carrying Amount		224,056
Investment securities held-to-maturity, Fair Value		230,558
Restricted investment in bank stocks, Carrying Amount	24,535	32,612
Restricted investment in bank stocks, Fair Value
Net loans, Carrying Amount	3,407,861	3,072,435
Net loans, Fair Value	3,421,539	3,059,343
Loans held-for-sale, Carrying Amount	15,112
Loans held-for-sale, Fair Value	15,112
Accrued interest receivable, Carrying Amount	12,497	12,545
Accrued interest receivable, Fair Value	12,497	12,545
Financial liabilities
Noninterest-bearing deposits, Carrying Amount	655,683	650,775
Noninterest-bearing deposits, Fair Value	655,683	650,775
Interest-bearing deposits, Carrying Amount	2,613,266	2,140,191
Interest-bearing deposits, Fair Value	2,601,221	2,137,149
Borrowings, Carrying Amount	481,337	671,587
Borrowings, Fair Value	486,503	674,131
Subordinated debentures, net	54,490	54,343
Subordinated debentures, Fair Value	53,784	55,209
Derivatives, Carrying Amount	1,212	131
Derivatives, Fair Value	1,212	131
Accrued interest payable, Carrying Amount	4,600	4,387
Accrued interest payable, Fair Value	4,600	4,387
Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and cash equivalents, Fair Value	233,794	200,895
Investment Securities Available-for-Sale, Fair Value	12,768	18,524
Investment securities held-to-maturity, Fair Value		29,226
Restricted investment in bank stocks, Fair Value
Net loans, Fair Value
Loans held-for-sale, Fair Value
Accrued interest receivable, Fair Value		68
Financial liabilities
Noninterest-bearing deposits, Fair Value	655,683	650,775
Interest-bearing deposits, Fair Value
Borrowings, Fair Value
Subordinated debentures, Fair Value
Derivatives, Fair Value
Accrued interest payable, Fair Value
Fair Value, Inputs, Level 2 [Member]
Financial assets
Cash and cash equivalents, Fair Value
Investment Securities Available-for-Sale, Fair Value	307,356	177,246
Investment securities held-to-maturity, Fair Value		182,774
Restricted investment in bank stocks, Fair Value
Net loans, Fair Value
Loans held-for-sale, Fair Value	15,112
Accrued interest receivable, Fair Value	1,895	2,699
Financial liabilities
Noninterest-bearing deposits, Fair Value
Interest-bearing deposits, Fair Value	2,601,221	2,137,149
Borrowings, Fair Value	486,503	674,131
Subordinated debentures, Fair Value	53,784	55,209
Derivatives, Fair Value	1,212	131
Accrued interest payable, Fair Value	4,600	4,387
Fair Value, Inputs, Level 3 [Member]
Financial assets
Cash and cash equivalents, Fair Value
Investment Securities Available-for-Sale, Fair Value	18,335
Investment securities held-to-maturity, Fair Value		18,558
Restricted investment in bank stocks, Fair Value
Net loans, Fair Value	3,421,539	3,059,343
Loans held-for-sale, Fair Value
Accrued interest receivable, Fair Value	10,602	9,778
Financial liabilities
Noninterest-bearing deposits, Fair Value
Interest-bearing deposits, Fair Value
Borrowings, Fair Value
Subordinated debentures, Fair Value
Derivatives, Fair Value
Accrued interest payable, Fair Value