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Transactions with Related Persons (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward] |  |  |
Beginning balance |  | $ 74 | $ 353
New loans |  | 134 | 11
Repayments |  | (9) | (290)
Ending balance |  | 199 | 74
Unfunded loan commitments available to related parties |  | $ 4,300 | $ 2,100
Class A Common Stock |  |  |
Loans and Leases Receivable, Related Parties [Roll Forward] |  |  |
Share repurchased from related party (in shares) |  | 382,000 | 0
Class A Common Stock | Related Party |  |  |
Loans and Leases Receivable, Related Parties [Roll Forward] |  |  |
Share repurchased from related party (in shares) | 100,000 |  |
Price of repurchased shares (usd per share) | $ 465 |  |

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