Acquisitions - Schedule of Loans Acquired (Details) $ in Thousands |
Dec. 31, 2017
USD ($)
|
|---|---|
| Purchased Credit Impaired | |
| Business Acquisition [Line Items] | |
| Contractual amounts due | $ 3,718 |
| Cash flows not expected to be collected | 955 |
| Expected cash flows | 2,763 |
| Interest component of expected cash flows | 603 |
| Fair value of acquired loans | 2,160 |
| All Other Acquired Loans | |
| Business Acquisition [Line Items] | |
| Contractual amounts due | 302,537 |
| Cash flows not expected to be collected | 3,687 |
| Expected cash flows | 298,850 |
| Interest component of expected cash flows | 73,786 |
| Fair value of acquired loans | $ 225,064 |