XML 62 R60.htm IDEA: XBRL DOCUMENT v3.2.0.727
Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net realized gains (losses) on investments $ 110 $ 3,950 $ 281 $ 4,852
Income taxes (16,516) (13,283) (32,209) (22,851)
NET INCOME 24,704 17,126 47,034 30,675
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net realized gains (losses) on investments 110 3,950 281 4,852
Income taxes (43) (1,524) (108) (1,872)
NET INCOME $ 67 $ 2,426 $ 173 $ 2,980