Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2012			2011
	(in thousands)
Total goodwill	$	115,554		$	109,639
Core deposit intangible:
Gross core deposit intangible balance, beginning of period	32,441			26,651
Accumulated amortization, beginning of period	(12,275		)	(7,955		)
Core deposit intangible, net, beginning of period	20,166			18,696
CDI current period amortization	(1,150		)	(984		)
Total core deposit intangible, end of period	19,016			17,712
Total goodwill and intangible assets, end of period	$	134,570		$	127,351

Estimated Future Amortization Expense of Core Deposit Intangibles

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

	Amount
	(in thousands)
Year ending December 31,
2012	$	3,295
2013	3,964
2014	3,397
2015	2,645
2016	2,184