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Fair Values - Reconciliation of Beginning and Ending Balances of Assets Measured at Fair Value on Recurring Basis Using Level 3 Inputs (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Adjustments to fair value included in earnings        
Valuation allowance on loans held-for-sale $ 0 $ (2,000) $ 0 $ (1,800)
Other Assets [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance, beginning     54,461 0
Consolidation of CT Legacy Partners       166,094
Proceeds from investments     (326) (37,279)
Deferred interest       195
Adjustments to fair value included in earnings        
Gain on investments at fair value     5,829 4,000
Balance, ending 59,964 133,010 59,964 133,010
Loans Held-for-Sale, Net [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance, beginning       0
Transfer from loans receivable, at fair value       2,000
Adjustments to fair value included in earnings        
Valuation allowance on loans held-for-sale       1,800
Balance, ending   3,800   3,800
Investment in CT Legacy Assets [Member]
       
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance, beginning       132,000
Consolidation of CT Legacy Partners       (132,000)
Adjustments to fair value included in earnings        
Balance, ending   $ 0   $ 0