XML 85 R113.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Values of Assets and Liabilities - Quantitative Inputs and Assumptions Used in Level 3 Fair Value Measurements (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Probability of default [Member]
Minimum [Member]
Dec. 31, 2012
Probability of default [Member]
Maximum [Member]
Dec. 31, 2012
Probability of default [Member]
Weighted average [Member]
Dec. 31, 2012
Prepayment rates [Member]
Dec. 31, 2012
Prepayment rates [Member]
Minimum [Member]
Dec. 31, 2012
Prepayment rates [Member]
Maximum [Member]
Dec. 31, 2012
Prepayment rates [Member]
Weighted average [Member]
Dec. 31, 2012
Discount rates [Member]
Dec. 31, 2012
Gas per MCF [Member]
Dec. 31, 2012
Gas per MCF [Member]
Minimum [Member]
Dec. 31, 2012
Gas per MCF [Member]
Maximum [Member]
Dec. 31, 2012
Oil per BBL/d [Member]
Dec. 31, 2012
Oil per BBL/d [Member]
Minimum [Member]
Dec. 31, 2012
Oil per BBL/d [Member]
Maximum [Member]
Dec. 31, 2012
NGL per gallon [Member]
Dec. 31, 2012
NGL per gallon [Member]
Weighted average [Member]
Dec. 31, 2012
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Dec. 31, 2012
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Probability of default [Member]
Dec. 31, 2012
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Discount rates [Member]
Minimum [Member]
Dec. 31, 2012
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Discount rates [Member]
Maximum [Member]
Dec. 31, 2012
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Discounted Cash Flow [Member]
Dec. 31, 2012
Other Investments [Member]
Dec. 31, 2012
Other Investments [Member]
Par Value [Member]
Dec. 31, 2012
Interest rate swap [Member]
Dec. 31, 2012
Interest rate swap [Member]
Minimum [Member]
Dec. 31, 2012
Interest rate swap [Member]
Maximum [Member]
Dec. 31, 2012
Interest rate swap [Member]
Counterparty credit risk [Member]
Dec. 31, 2012
Interest rate swap [Member]
Option model [Member]
Dec. 31, 2012
Impaired Loans [Member]
Dec. 31, 2012
Impaired Loans [Member]
Weighted average [Member]
Dec. 31, 2012
Impaired Loans [Member]
Discount rates [Member]
Dec. 31, 2012
Impaired Loans [Member]
Reserve study [Member]
Dec. 31, 2012
Other Real Estate Owned [Member]
Dec. 31, 2012
Other Real Estate Owned [Member]
Counterparty credit risk [Member]
Dec. 31, 2012
Other Real Estate Owned [Member]
Internal Valuation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                                                          
Weighted average rate     0.00% 100.00% 21.95%   0.00% 100.00% 12.20%                       6.50% 20.00%         9.66% 11.95%       10.00%          
Weighted average                       2.92 5.48   84.64 96.86   1.42                                      
Unobservable Inputs           Prepayment rates       Discount rates Gas per MCF     Oil per BBL/d     NGL per gallon     Probability of default                  Counterparty credit risk       Discount rate         
Valuation Technique                                             Discounted Cash Flow   Par Value         Option model       Reserve study     Internal Valuation
Fair Value $ 1,216,011 $ 1,212,048                                 $ 23,373         $ 1,420   $ 0         $ 751       $ 247