Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value hierarchy - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financial assets
Cash and cash equivalents, Carrying Amount	$ 118,259	$ 200,895	$ 88,543	$ 126,847
Cash and cash equivalents, Fair Value	118,259	200,895
Investment securities available-for-sale	191,331	195,770
Investment Securities Available-for-Sale, Fair Value	191,331	195,770
Investment securities held-to-maturity, Carrying Amount	219,373	224,056
Investment securities held-to-maturity, Fair Value	229,470	230,558
Investments in restricted stock, at cost, Carrying Amount	$ 31,487	$ 32,612
Investments in restricted stock, at cost, Fair Value
Net loans, Carrying Amount	$ 3,234,739	$ 3,072,435
Net loans, Fair Value	3,242,398	3,059,343
Accrued interest receivable, Carrying Amount	12,604	12,545
Accrued interest receivable, Fair Value	12,604	12,545
Financial liabilities
Noninterest-bearing deposits, Carrying Amount	614,507	650,775
Noninterest-bearing deposits, Fair Value	614,507	650,775
Interest-bearing deposits, Carrying Amount	2,278,564	2,140,191
Interest-bearing deposits, Fair Value	2,285,918	2,137,149
Borrowings, Carrying Amount	646,501	671,587
Borrowings, Fair Value	651,739	674,131
Subordinated debentures, net	54,392	54,343
Subordinated debentures, Fair Value	57,879	55,209
Derivatives	1,568	131
Derivatives	1,568	131
Accrued interest payable, Carrying Amount	5,101	4,387
Accrued interest payable, Fair Value	5,101	4,387
Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and cash equivalents, Fair Value	118,259	200,895
Investment Securities Available-for-Sale, Fair Value	20,863	18,524
Investment securities held-to-maturity, Fair Value	30,413	29,226
Accrued interest receivable, Fair Value	199	68
Financial liabilities
Noninterest-bearing deposits, Fair Value	$ 614,507	650,775
Derivatives
Fair Value, Inputs, Level 2 [Member]
Financial assets
Investment Securities Available-for-Sale, Fair Value	$ 170,468	177,246
Investment securities held-to-maturity, Fair Value	180,553	182,774
Accrued interest receivable, Fair Value	2,486	2,699
Financial liabilities
Interest-bearing deposits, Fair Value	2,285,918	2,137,149
Borrowings, Fair Value	651,739	674,131
Subordinated debentures, Fair Value	57,879	55,209
Derivatives	1,568	131
Accrued interest payable, Fair Value	$ 5,101	$ 4,387
Fair Value, Inputs, Level 3 [Member]
Financial assets
Investment Securities Available-for-Sale, Fair Value
Investment securities held-to-maturity, Fair Value	$ 18,504	$ 18,558
Net loans, Fair Value	3,242,398	3,059,343
Accrued interest receivable, Fair Value	$ 9,919	$ 9,778
Financial liabilities
Derivatives