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Goodwill and Intangible Assets - Schedule of Changes in Goodwill and Intangible Assets by Operating Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets, beginning | $ 63,778 | $ 46,531 | $ 27,854
Acquired goodwill | 115,050 | 16,340 | 12,842
Acquired intangibles | 28,002 | 9,478 | 9,617
Amortization of intangibles | (6,980) | (5,201) | (3,782)
Divestiture of intangibles | (433) | (1,339) |
Reclass of goodwill to assets held for sale |  | (1,024) |
Reclass of intangibles to assets held for sale |  | (1,007) |
Goodwill and intangible assets, ending | 199,417 | 63,778 | 46,531
Operating Segments | Banking |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets, beginning | 54,910 | 36,139 | 17,482
Acquired goodwill | 72,075 | 16,340 | 12,842
Acquired intangibles | 14,069 | 9,478 | 8,818
Amortization of intangibles | (5,144) | (5,016) | (3,003)
Divestiture of intangibles | (433) |  |
Reclass of goodwill to assets held for sale |  | (1,024) |
Reclass of intangibles to assets held for sale |  | (1,007) |
Goodwill and intangible assets, ending | 135,477 | 54,910 | 36,139
Operating Segments | Factoring |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets, beginning | 8,868 | 8,871 | 8,875
Acquired goodwill | 42,975 |  |
Acquired intangibles | 13,933 |  |
Amortization of intangibles | (1,836) | (3) | (4)
Goodwill and intangible assets, ending | 63,940 | 8,868 | 8,871
Operating Segments | Corporate |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets, beginning |  | 1,521 | 1,497
Acquired intangibles |  |  | 799
Amortization of intangibles |  | (182) | (775)
Divestiture of intangibles |  | $ (1,339) |
Goodwill and intangible assets, ending | $ 0 |  | $ 1,521

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