XML 45 R30.htm IDEA: XBRL DOCUMENT v3.5.0.2
Investments and Fair Value Measurements - Schedule of Maturity Profile of Investments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]    
Held-to-maturity due within one year $ 3,088  
Held-to-maturity due one year through five years 5,280 $ 8,369
Held-to-maturity due five years through ten years 2,361 3,127
Held-to-maturity due over ten years 7,974 12,193
Held-to-maturity cost or amortized cost $ 15,615 $ 23,689