Other Non-Interest Income and Expense (Other Non-Interest Income and Expense) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Other	$ 34,531	$ 30,703	$ 26,370
Total other non-interest income	34,531	30,703	26,370
Advertising, promotions and public relations	26,232	27,194	25,420
Legal and other professional fees	26,132	22,341	19,802
Travel/meals and entertainment	13,571	13,049	11,493
Check card expense	11,787	10,227	9,326
Other	74,355	66,658	71,552
Total other non-interest expense	$ 152,077	$ 139,469	$ 137,593