Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

The following table sets forth activity for goodwill and intangible assets for the period:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(in thousands)
Total goodwill at beginning of period	$	115,554		$	118,434		$	115,554		$	109,639
Established through acquisitions	—			—			—			8,795
Total goodwill at end of period	115,554			118,434			115,554			118,434
Core deposit intangible:
Gross core deposit intangible balance at beginning of period	32,441			28,497			32,441			26,651
Accumulated amortization at beginning of period	(14,545		)	(9,894		)	(12,275		)	(7,955		)
Core deposit intangible, net at beginning of period	17,896			18,603			20,166			18,696
Established through acquisitions	—			3,943			—			5,789
CDI current period amortization	(1,093		)	(1,177		)	(3,363		)	(3,116		)
Total core deposit intangible, net at end of period	16,803			21,369			16,803			21,369
Total goodwill and intangible assets at end of period	$	132,357		$	139,803		$	132,357		$	139,803

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of core deposit intangibles for the remaining three months ending December 31, 2012 and the succeeding four years:

	Amount
	(in thousands)
Year ending December 31,
2012	$	1,082
2013	3,964
2014	3,397
2015	2,645
2016	2,184