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Basis of Presentation - Acquisition of 5 Arches (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 01, 2019 | May 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |
Remeasurement gain |  |  | $ 0 | $ 0 | $ 2,441 | $ 0 |
Contingent consideration |  |  | 24,932 |  | 24,932 |  | $ 0
Mortgage banking activities, net |  |  | 19,160 | $ 10,596 | 31,469 | $ 37,172 |
5 Arches, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percent acquired | 80.00% |  |  |  |  |  |
Minority interest, percentage |  | 20.00% |  |  |  |  |
Payment of cash to acquire business | $ 13,000 |  |  |  |  |  |
Contingent consideration maximum amount | 27,000 |  |  |  |  |  |
Contingent consideration performance term |  | 2 years |  |  |  |  |
Remeasurement gain |  |  |  |  | 2,000 |  |
Intangibles | 24,800 |  |  |  |  |  |
Goodwill | 28,728 |  | $ 28,728 |  | 28,728 |  | $ 0
Goodwill deductible for tax purposes | 3,000 |  |  |  |  |  |
Contingent consideration | $ 24,621 |  |  |  |  |  |
Revenue |  |  |  |  | 6,000 |  |
Net loss |  |  |  |  | 2,000 |  |
Intangible assets amortization expense |  |  |  |  | $ 3,000 |  |
5 Arches, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to acquire equity method investment |  | $ 10,000 |  |  |  |  |
Option to purchase additional equity, term |  | 1 year |  |  |  |  |

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