XML 58 R45.htm IDEA: XBRL DOCUMENT v3.4.0.3
Investment Securities - Additional Information (Detail)
$ in Thousands
Mar. 31, 2016
USD ($)
Investment
Dec. 31, 2015
USD ($)
Amortized Cost and Fair Value Debt Securities [Abstract]    
Number of investment securities with aggregate gross unrealized losses | Investment 538  
Unrealized losses on individual investment securities $ 76,147 $ 120,269
Cost method investment securities $ 536,000