Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

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,
	2016			2015			2016			2015
	(in thousands)
Goodwill
Total goodwill	$	382,762		$	382,537		$	382,762		$	382,537
Other intangible assets, net
Core deposit intangible:
Gross core deposit intangible balance at beginning of period	58,598			58,598			58,598			58,598
Accumulated amortization at beginning of period	(37,523		)	(30,875		)	(35,940		)	(29,058		)
Core deposit intangible, net at beginning of period	21,075			27,723			22,658			29,540
CDI current period amortization	(1,483		)	(1,718		)	(3,066		)	(3,535		)
Total core deposit intangible, net at end of period	19,592			26,005			19,592			26,005
Intangible assets not subject to amortization	919			919			919			919
Other intangible assets, net at end of period	20,511			26,924			20,511			26,924
Total goodwill and other intangible assets at end of period	$	403,273		$	409,461		$	403,273		$	409,461

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, 2016 and the succeeding four years:

	Amount
	(in thousands)
Year ending December 31,
2016	$	2,880
2017	4,913
2018	3,855
2019	2,951
2020	2,048