| **Quarterly Results of Operations (Unaudited)**           | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| **Quarterly Financial Information Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Quarterly Results of Operations (Unaudited)               | QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)The following table sets forth certain quarterly results for the years ended December 31, 2014 and 2013: 20142013FirstSecondThirdFourthFirstSecondThirdFourthInterest income$51,009$51,527$53,290$53,053$43,738$40,653$40,736$45,707Interest expense5,1175,4085,4245,8934,2804,0033,7144,572Net interest income45,89246,11947,86647,16039,45836,65037,02241,135Provision for loan losses1,6009602,1021,9971,5331,016Net interest income after provision for loan losses45,89246,11946,26646,20037,35634,65335,48940,119Non-interest income15,18615,93318,29416,25413,87714,05911,80015,073Non-interest expense43,08941,25042,57641,67734,70033,74234,21940,558Income before income tax expense17,98920,80221,98420,77716,53314,97013,07014,634Income tax expense4,3695,6425,8625,5174,6684,1552,6673,187Net income13,62015,16016,12215,26011,86510,81510,40311,447Preferred stock dividends(857)(852)(430)(241)Net income available to common stockholders$13,620$15,160$16,122$15,260$11,008$9,963$9,973$11,206Basic EPS$0.38$0.42$0.45$0.41 $0.38$0.35$0.35$0.34Diluted EPS$0.38$0.41$0.45$0.41 $0.38$0.34$0.35$0.34Average Shares Outstanding:Basic35,956,43636,026,76336,054,86737,018,01428,716,98728,783,40728,806,80932,597,145Diluted36,260,62436,294,14936,328,98137,323,27628,971,23829,023,51329,081,47232,912,605 |

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| - Definition
The entire disclosure for the quarterly financial data in the annual financial statements.  The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1280-108306Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a
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