XML 75 R64.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value Measurements - Summary of Placement in the Fair Value Hierarchy of Financial Assets that are Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Assets    
Fair value of financial assets measured at fair value on a recurring basis $ 269,759 $ 335,307
U.S. government debt securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 91,987 180,323
Equity securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 23,901 23,522
Preferred stock    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 144,742 129,545
Other    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 9,129 1,917
Quoted Prices in Active Markets (Level 1)    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 18,042 15,544
Quoted Prices in Active Markets (Level 1) | U.S. government debt securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Quoted Prices in Active Markets (Level 1) | Equity securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 18,042 15,544
Quoted Prices in Active Markets (Level 1) | Preferred stock    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Quoted Prices in Active Markets (Level 1) | Other    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2)    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 106,975 190,218
Significant Other Observable Inputs (Level 2) | U.S. government debt securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 91,987 180,323
Significant Other Observable Inputs (Level 2) | Equity securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 5,859 7,978
Significant Other Observable Inputs (Level 2) | Preferred stock    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2) | Other    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 9,129 1,917
Significant Unobservable Inputs (Level 3)    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 144,742 129,545
Significant Unobservable Inputs (Level 3) | U.S. government debt securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Significant Unobservable Inputs (Level 3) | Equity securities    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 0 0
Significant Unobservable Inputs (Level 3) | Preferred stock    
Assets    
Fair value of financial assets measured at fair value on a recurring basis 144,742 129,545
Significant Unobservable Inputs (Level 3) | Other    
Assets    
Fair value of financial assets measured at fair value on a recurring basis $ 0 $ 0