Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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 June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(in thousands)
Goodwill
Total goodwill (1)	$	382,537		$	343,952		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			58,598			47,698
Accumulated amortization at beginning of period	(30,875		)	(24,344		)	(29,058		)	(22,765		)
Core deposit intangible, net at beginning of period	27,723			23,354			29,540			24,933
CDI current period amortization	(1,718		)	(1,481		)	(3,535		)	(3,060		)
Total core deposit intangible, net at end of period	26,005			21,873			26,005			21,873
Intangible assets not subject to amortization	919			919			919			919
Other intangible assets, net at end of period	26,924			22,792			26,924			22,792
Total goodwill and other intangible assets at end of period	$	409,461		$	366,744		$	409,461		$	366,744

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of core deposit intangibles for the remaining six months ending December 31, 2015 and the succeeding four years:

	Amount
	(in thousands)
Year ending December 31,
2015	$	3,347
2016	5,945
2017	4,913
2018	3,855
2019	2,951