Notes Payable, Federal Home Loan Bank Advances, Other Borrowings and Subordinated Notes (Summary Of Notes Payable, Federal Home Loan Bank Advances, Other Borrowings, Secured Borrowings And Subordinated Notes) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Debt Disclosure [Abstract]
Notes payable	$ 182	$ 364	$ 31,911
Federal Home Loan Bank advances	387,672	417,762	414,032
Securities sold under repurchase agreements	211,692	235,347	224,297
Other	19,212	19,393	31,947
Total other borrowings	230,904	254,740	256,244
Subordinated notes	0	0	15,000
Total notes payable, Federal Home Loan Bank advances, other borrowings and subordinated notes	$ 618,758	$ 672,866	$ 717,187