Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income [Line Items]      
Balance at beginning of period $ 5,418 $ 3,524  
Other comprehensive (loss) income before reclassification (13,759) 2,998  
Reclassification from accumulated other comprehensive income (1,039) (1,104)  
Other comprehensive (loss ) income (14,798) 1,894 6,488
Balance at end of period (9,380) 5,418 3,524
Accumulated Net Unrealized Investment Gain (Loss) [Member]
      
Accumulated Other Comprehensive Income [Line Items]      
Balance at beginning of period 7,348 4,115  
Other comprehensive (loss) income before reclassification (24,496) 4,337  
Reclassification from accumulated other comprehensive income (1,039) (1,104)  
Other comprehensive (loss ) income (25,535) 3,233  
Balance at end of period (18,187) 7,348  
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Interest-Only Strip [Member]
      
Accumulated Other Comprehensive Income [Line Items]      
Balance at beginning of period   20  
Other comprehensive (loss) income before reclassification   (4)  
Other comprehensive (loss ) income   (4)  
Balance at end of period 16 16  
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Swap [Member]
      
Accumulated Other Comprehensive Income [Line Items]      
Balance at beginning of period   (9)  
Other comprehensive (loss) income before reclassification   9  
Reclassification from accumulated other comprehensive income        
Other comprehensive (loss ) income    9  
Balance at end of period       
Tax (Expense) Benefit [Member]
      
Accumulated Other Comprehensive Income [Line Items]      
Balance at beginning of period (1,946) (602)  
Other comprehensive (loss) income before reclassification 10,737 (1,344)  
Other comprehensive (loss ) income 10,737 (1,344)  
Balance at end of period $ 8,791 $ (1,946)