Significant Accounting Policies - Additional Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Accounting Policies [Abstract]
Cash paid for interest	$ 6,461	$ 12,039
Cash paid for income taxes	27,188	32,623
Loans foreclosed and transferred to other real estate owned and foreclosed assets	1,622	2,913
Loans to facilitate the sale of other real estate owned	102	0
Deferred gain on sale of building and parking garage	$ 0	$ 1,120