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Segment Reporting - Schedule of Segment Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |
Net interest income | $ 30,427 | $ 28,358 | $ 60,678 | $ 54,301 |
Provision for loan losses | (865) | (789) | (1,122) | (798) |
Mortgage banking income | 32,079 | 30,133 | 57,660 | 54,636 |
Mortgage banking income | 30,239 | 30,133 | 55,319 | 54,636 |
Change in fair value of mortgage servicing rights | (1,840) |  | (2,341) |  |
Other noninterest income | 5,418 | 8,223 | 11,425 | 14,755 |
Depreciation and amortization | 991 | 1,007 | 1,993 | 2,022 |
Amortization of intangibles | 123 | 527 | 515 | 1,079 |
Amortization and impairment of mortgage servicing rights |  | 6,882 |  | 9,112 |
Loss on sale of mortgage servicing rights | 249 |  | 249 |  |
Other noninterest mortgage banking expense | 24,791 | 19,535 | 47,159 | 36,789 |
Other noninterest expense | 22,982 | 22,644 | 45,637 | 42,940 |
Income before income taxes | 17,813 | 16,908 | 32,991 | 32,548 |
Income tax expense | 6,574 | 1,133 | 11,999 | 2,174 |
Net income | 11,239 | 15,775 | 20,992 | 30,374 |
Total assets | 3,346,570 | 2,917,958 | 3,346,570 | 2,917,958 | $ 3,276,881
Goodwill | 46,867 | 46,867 | 46,867 | 46,867 | $ 46,867
Banking Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net interest income | 29,999 | 29,217 | 59,855 | 55,231 |
Provision for loan losses | (865) | (789) | (1,122) | (798) |
Mortgage banking income | 7,118 | 7,215 | 12,784 | 13,359 |
Other noninterest income | 5,418 | 8,223 | 11,425 | 14,755 |
Depreciation and amortization | 861 | 901 | 1,725 | 1,802 |
Amortization of intangibles | 123 | 527 | 515 | 1,079 |
Other noninterest mortgage banking expense | 5,368 | 4,072 | 10,204 | 7,930 |
Other noninterest expense | 22,982 | 22,644 | 45,637 | 42,940 |
Income before income taxes | 14,066 | 17,300 | 27,105 | 30,392 |
Total assets | 2,878,437 | 2,508,867 | 2,878,437 | 2,508,867 |
Goodwill | 46,767 | 46,767 | 46,767 | 46,767 |
Mortgage Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net interest income | 428 | (859) | 823 | (930) |
Mortgage banking income | 24,961 | 22,918 | 44,876 | 41,277 |
Change in fair value of mortgage servicing rights | (1,840) |  | (2,341) |  |
Depreciation and amortization | 130 | 106 | 268 | 220 |
Amortization and impairment of mortgage servicing rights |  | 6,882 |  | 9,112 |
Loss on sale of mortgage servicing rights | 249 |  | 249 |  |
Other noninterest mortgage banking expense | 19,423 | 15,463 | 36,955 | 28,859 |
Income before income taxes | 3,747 | (392) | 5,886 | 2,156 |
Total assets | 468,133 | 409,091 | 468,133 | 409,091 |
Goodwill | $ 100 | $ 100 | $ 100 | $ 100 |

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