Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Activity in Accumulated Other Comprehensive Income (Detail)

v2.4.0.8
Accumulated Other Comprehensive Income - Activity in Accumulated Other Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income [Line Items]    
Balance at beginning of period $ (9,380) $ 5,418
Other comprehensive (loss) income before reclassification 5,292 (314)
Reclassification from accumulated other comprehensive income (1,421) (9)
Other comprehensive income (loss) 3,871 (323)
Balance at end of period (5,509) 5,095
Accumulated Net Unrealized Investment Gain (Loss) [Member]
    
Accumulated Other Comprehensive Income [Line Items]    
Balance at beginning of period (18,187) 7,348
Other comprehensive (loss) income before reclassification 8,098 (568)
Reclassification from accumulated other comprehensive income (1,421) (9)
Other comprehensive income (loss) 6,677 (577)
Balance at end of period (11,510) 6,771
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Interest-Only Strip [Member]
    
Accumulated Other Comprehensive Income [Line Items]    
Balance at beginning of period 16 16
Other comprehensive (loss) income before reclassification 1 3
Reclassification from accumulated other comprehensive income      
Other comprehensive income (loss) 1 3
Balance at end of period 17 19
Tax (Expense) Benefit [Member]
    
Accumulated Other Comprehensive Income [Line Items]    
Balance at beginning of period 8,791 (1,946)
Other comprehensive (loss) income before reclassification (2,807) 251
Reclassification from accumulated other comprehensive income      
Other comprehensive income (loss) (2,807) 251
Balance at end of period $ 5,984 $ (1,695)