Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary Of Investments (Details)

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Fair Value Measurements - Summary Of Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 8,084 $ 2,978
Gross unrealized gains in Accumulated OCI 1,283 904
Gross unrealized losses in Accumulated OCI (2,162) (267)
Fair value 7,205 3,615
Common stock investments, available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 8,084 2,978
Gross unrealized gains in Accumulated OCI 1,283 904
Gross unrealized losses in Accumulated OCI (2,162) (267)
Fair value $ 7,205 $ 3,615