v3.3.1.900
Fair Value Measurements - Changes in Level 3 Financial Instruments (Details) - Other investments - Fair Value, Measurements, Recurring - Significant Unobservable Inputs (Level 3) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 6,581 $ 5,092
Total realized gains – included in net realized and unrealized gains on investment 192 439
Total realized (losses) – included in net realized and unrealized gains on investment 0 0
Change in total unrealized gains – included in other comprehensive (loss) income 373 1,139
Change in total unrealized losses – included in other comprehensive (loss) income 0 0
Purchases 217 6,698
Sales and redemptions (456) (797)
Transfers into Level 3 0 0
Transfers out of Level 3 0 (5,990)
Balance at end of period 6,907 6,581
Level 3 gains (losses) included in net income attributable to the change in unrealized gains (losses) relating to assets held at the reporting date $ 0 $ 0