Basis and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-02 - USD ($) $ in Thousands |
Mar. 31, 2019 |
Jan. 01, 2019 |
|---|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Opening Balance Sheet Adjustment - ASC 842, net of taxes | $ 2,592 | |
| Retained Earnings | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Opening Balance Sheet Adjustment - ASC 842, net of taxes | $ 2,592 | $ 2,612 |