Fair Value Measurements - Rollforward of Level 3 Assets (Details) - Municipal bonds - USD ($) $ in Thousands |
6 Months Ended | |
---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
|
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
Beginning Balance | $ 1,166 | $ 1,178 |
Total gains or (losses) included in other comprehensive income | 68 | (32) |
Ending Balance | $ 1,234 | $ 1,146 |