| Schedule of Business Acquisitions, by Acquisition [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 500 | | | $ | — | | | $ | 500 | | Contingent payment liability | | | 500 | | | | — | | | | 500 | | | | | | 1,000 | | | | — | | | | 1,000 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 20 | | | | — | | | | 20 | | Intangible assets – trade name | | | 129 | | | | (129 | | | | — | | Intangible assets – customer relationships | | | 424 | | | | — | | | | 424 | | Intangible assets – non-competition agreements | | | 257 | | | | — | | | | 257 | | | | | | 4 | | | | — | | | | 4 | | | | | | 834 | | | | (129 | | | | 705 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 336 | | | | (45 | | | | 291 | | | | | | 46 | | | | — | | | | 46 | | | | | | 382 | | | | (45 | | | | 337 | | | | | | | | | | | | | | | | | | | | 452 | | | | (84 | | | | 368 | | | | | | | | | | | | | | | | Goodwill resulting from acquisition of RJM | | $ | 548 | | | $ | 84 | | | $ | 632 | | | | | | | | | | | | | | | | | | | | | | | | | | | Common shares issued (3,878,304) | | $ | 121,391 | | | $ | — | | | $ | 121,391 | | Cash in lieu of fractional shares | | | 2 | | | | — | | | | 2 | | Cash-out of certain warrants | | | 1,323 | | | | — | | | | 1,323 | | Fair value of options assumed | | | 2,343 | | | | — | | | | 2,343 | | | | | | 125,059 | | | | — | | | | 125,059 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 17,934 | | | | — | | | | 17,934 | | Investment securities available for sale | | | 181,838 | | | | — | | | | 181,838 | | | | | | 426,601 | | | | (1,864 | | | | 424,737 | | | | | | 9,037 | | | | — | | | | 9,037 | | | | | | 6,288 | | | | 1,396 | | | | 7,684 | | Bank-owned life insurance | | | 12,054 | | | | — | | | | 12,054 | | | | | | 4,191 | | | | — | | | | 4,191 | | | | | | 792 | | | | (68 | | | | 724 | | | | | | 18,085 | | | | (111 | | | | 17,974 | | | | | | 676,820 | | | | (647 | | | | 676,173 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 481,674 | | | | — | | | | 481,674 | | FHLB and other long-term borrowings | | | 19,726 | | | | — | | | | 19,726 | | | | | | 108,609 | | | | — | | | | 108,609 | | Unfavorable lease liability | | | 2,884 | | | | — | | | | 2,884 | | | | | | 4,706 | | | | 1,867 | | | | 6,573 | | | | | | 617,599 | | | | 1,867 | | | | 619,466 | | | | | | | | | | | | | | | | | | | | 59,221 | | | | (2,514 | | | | 56,707 | | | | | | | | | | | | | | | | Goodwill resulting from the CBH Merger | | $ | 65,838 | | | $ | 2,514 | | | $ | 68,352 | | | | | | | | | | | | | | | | | $ | 5,399 | | Contingent payment disbursed | | | 542 | | Contingent payment liability | | | 1,083 | | | | | | 7,024 | | | | | | | | | | | | | | | | | | 1,274 | | | | | | 302 | | | | | | 100 | | Intangible assets – customer relationships | | | 3,280 | | Intangible assets – non-competition agreements | | | 1,580 | | Intangible assets – trade name | | | 955 | | | | | | 850 | | | | | | 8,341 | | | | | | | | | | | | | | | | | | 2,437 | | | | | | 1,818 | | | | | | 4,255 | | | | | | | | | | | | 4,086 | | | | | | | | Goodwill resulting from acquisition of PCPB | | $ | 2,938 | |
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| Business Acquisition, Pro Forma Information [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | $ | 106,236 | | | $ | 100,127 | | | $ | 100,609 | | Provision for loan and lease losses | | | 4,326 | | | | 4,396 | | | | 2,041 | | Net interest income after provision for loan and lease losses | | | 101,910 | | | | 95,731 | | | | 98,568 | | | | | | 54,039 | | | | 55,960 | | | | 51,836 | | | | | | 101,745 | | | | 125,765 | | | | 100,011 | | Income before income taxes | | | 54,204 | | | | 25,926 | | | | 50,393 | | | | | | 18,168 | | | | 9,172 | | | | 17,673 | | | | | $ | 36,036 | | | $ | 16,754 | | | $ | 32,720 | | | | | | | | | | | | | | | | Weighted-average basic shares outstanding | | | 16,859,623 | | | | 17,488,325 | | | | 17,444,543 | | | | | | 168,499 | | | | 267,996 | | | | 373,384 | | Adjusted weighted-average diluted shares | | | 17,028,122 | | | | 17,756,321 | | | | 17,817,927 | | Basic earnings per common share | | $ | 2.14 | | | $ | 0.96 | | | $ | 1.88 | | Diluted earnings per common share | | $ | 2.12 | | | $ | 0.94 | | | $ | 1.84 | |
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