Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

The following table sets forth activity for goodwill and other intangible assets for the periods indicated:

	Three Months Ended March 31,
	2015			2014
	(in thousands)
Goodwill
Total goodwill (1)	$	382,537		$	343,952
Other intangible assets, net
Core deposit intangible:
Gross core deposit intangible balance at beginning of period (1)	58,598			47,698
Accumulated amortization at beginning of period	(29,058		)	(22,765		)
Core deposit intangible, net at beginning of period	29,540			24,933
CDI current period amortization	(1,817		)	(1,579		)
Total core deposit intangible, net at end of period	27,723			23,354
Intangible assets not subject to amortization	919			919
Other intangible assets, net at end of period	28,642			24,273
Total goodwill and other intangible assets at end of period	$	411,179		$	368,225

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, 2015 and the succeeding four years:

	Amount
	(in thousands)
Year ending December 31,
2015	$	5,065
2016	5,945
2017	4,913
2018	3,855
2019	2,951