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Tax-Free Spin-Off and Merger - Income Statement Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Provision for income taxes | $ 10,806 | $ 14,899 | $ 12,327 | $ 7,009 | $ 9,320 | $ 14,558 | $ 12,963 | $ 9,052 | $ 45,042 | $ 45,893 | $ 29,912
Net income from continuing operations | 21,615 | 7,754 | 23,722 | 25,747 | 19,828 | 21,207 | 19,483 | 18,184 | 78,837 | 78,702 | 58,583
Net income |  |  |  |  |  |  |  |  | 78,837 | 78,702 | 58,583
Preferred stock dividends | 3,615 | 3,615 | 3,615 | 3,615 | 3,615 | 2,552 | 2,062 | 1,286 | 14,459 | 9,515 | 2,493
Net income available to common shareholders | $ 18,000 | $ 4,139 | $ 20,107 | $ 22,132 | $ 16,213 | $ 18,655 | $ 17,421 | $ 16,898 | $ 64,378 | 69,187 | 56,090
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  | 322,539 | 249,850
Interest expense |  |  |  |  |  |  |  |  |  | 73,042 | 53,560
Net interest income |  |  |  |  |  |  |  |  |  | 249,497 | 196,290
Provision for loan losses |  |  |  |  |  |  |  |  |  | 3,041 | 20,566
Non-interest income |  |  |  |  |  |  |  |  |  | 56,370 | 27,717
Non-interest expense |  |  |  |  |  |  |  |  |  | 178,231 | 114,946
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  |  | 124,595 | 88,495
Provision for income taxes |  |  |  |  |  |  |  |  |  | 45,893 | 29,912
Net income from continuing operations |  |  |  |  |  |  |  |  |  | 78,702 | 58,583
Loss from discontinued operations before income taxes |  |  |  |  |  |  |  |  |  | 0 | 0
Income tax benefit from discontinued operations |  |  |  |  |  |  |  |  |  | 0 | 0
Net loss from discontinued operations |  |  |  |  |  |  |  |  |  | 0 | 0
Net income |  |  |  |  |  |  |  |  |  | 78,702 | 58,583
Preferred stock dividends |  |  |  |  |  |  |  |  |  | 9,515 | 2,493
Net income available to common shareholders |  |  |  |  |  |  |  |  |  | 69,187 | 56,090
As Previously Reported | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  | 322,539 | 249,850
Interest expense |  |  |  |  |  |  |  |  |  | 73,023 | 53,551
Net interest income |  |  |  |  |  |  |  |  |  | 249,516 | 196,299
Provision for loan losses |  |  |  |  |  |  |  |  |  | 2,345 | 20,566
Non-interest income |  |  |  |  |  |  |  |  |  | 23,165 | 27,572
Non-interest expense |  |  |  |  |  |  |  |  |  | 131,217 | 107,568
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  |  | 139,119 | 95,737
Provision for income taxes |  |  |  |  |  |  |  |  |  | 51,412 | 32,664
Net income from continuing operations |  |  |  |  |  |  |  |  |  | 87,707 | 63,073
Loss from discontinued operations before income taxes |  |  |  |  |  |  |  |  |  | (14,524) | (7,242)
Income tax benefit from discontinued operations |  |  |  |  |  |  |  |  |  | (5,519) | (2,752)
Net loss from discontinued operations |  |  |  |  |  |  |  |  |  | (9,005) | (4,490)
Net income |  |  |  |  |  |  |  |  |  | 78,702 | 58,583
Preferred stock dividends |  |  |  |  |  |  |  |  |  | 9,515 | 2,493
Net income available to common shareholders |  |  |  |  |  |  |  |  |  | 69,187 | 56,090
BankMobile | Adjustment | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | 19 | 9
Net interest income |  |  |  |  |  |  |  |  |  | (19) | (9)
Provision for loan losses |  |  |  |  |  |  |  |  |  | 696 | 0
Non-interest income |  |  |  |  |  |  |  |  |  | 33,205 | 145
Non-interest expense |  |  |  |  |  |  |  |  |  | 47,014 | 7,378
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  |  | (14,524) | (7,242)
Provision for income taxes |  |  |  |  |  |  |  |  |  | (5,519) | (2,752)
Net income from continuing operations |  |  |  |  |  |  |  |  |  | (9,005) | (4,490)
Loss from discontinued operations before income taxes |  |  |  |  |  |  |  |  |  | 14,524 | 7,242
Income tax benefit from discontinued operations |  |  |  |  |  |  |  |  |  | 5,519 | 2,752
Net loss from discontinued operations |  |  |  |  |  |  |  |  |  | 9,005 | 4,490
Net income |  |  |  |  |  |  |  |  |  | 0 | 0
Preferred stock dividends |  |  |  |  |  |  |  |  |  | 0 | 0
Net income available to common shareholders |  |  |  |  |  |  |  |  |  | $ 0 | $ 0

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