v2.4.0.6
Guaranteed Preferred Beneficial Interest in Company's Junior Subordinated Debentures - Additional Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
1 Months Ended 12 Months Ended
May 28, 2010
Sep. 30, 1997
Dec. 31, 2012
Schedule of Investments [Line Items]      
Trust Preferred Securities issued   $ 105,446  
Number of Trust Preferred Securities issued   4,217,724  
Interest rate on Trust Preferred Securities   11.60%  
Interest rate Junior Subordinated Debentures   11.60%  
Liquidation amount of preferred security     $ 25.00
Trust issued common securities to the Company     3,261
Debentures interest payment defer period maximum     60 months
Maturity date of preferred securities     Sep. 30, 2027
Percentage of redemption price of debentures over principal amount     100.00%
Junior Subordinated Debentures recorded at fair value based on price 116,085    
Trust Preferred Securities underlying price $ 26.75    
Amortizing the premium on Junior Subordinated Debentures $ 7,381