Mergers And Acquisitions (Fair Value Of Net Assets) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Common stock issued, net of offering costs	$ 136,441
Warrant assumed	4,459
Total consideration paid	140,900
Cash and cash equivalents	203,538
Securities	486,186
Loans	919,479
Other intangible assets	16,033
Accrued income and other assets	116,992
Total identifiable assets acquired	1,742,228
Deposits	1,525,253
Borrowings	171,606
Accrued expenses and other liabilities	12,685
Total liabilities assumed	1,709,544
Fair value of net identifiable assets acquired	32,684
Goodwill recognized	$ 108,216