Fair Value of Financial Instruments - Level 3 Fair Value Measurements (Details) - Significant Unobservable Inputs Level 3 [Member] - Equity securities [Member] $ in Thousands |
9 Months Ended |
|---|---|
|
Sep. 30, 2016
USD ($)
| |
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Beginning balance | $ 1,486 |
| Total Realized / Unrealized Gains (Losses) Included in Net Income | 0 |
| Total Realized / Unrealized Gains (Losses) Included in Other Comprehensive Income | 93 |
| Total Realized / Unrealized Gains (Losses) Included in Purchases, Sales, Issuances and Settlements, Net | 0 |
| Transfer In (Out) of Level 3 | (1,579) |
| Ending balance | $ 0 |