Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2014

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 September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
	(in thousands)
Goodwill
Goodwill at beginning of period (1)	$	343,952		$	343,952		$	343,952		$	115,554
Established through acquisitions (1)	—			—			—			228,398
Total goodwill	343,952			343,952			343,952			343,952
Other intangible assets, net
Core deposit intangible:
Gross core deposit intangible balance at beginning of period	47,698			47,698			47,698			32,441
Accumulated amortization at beginning of period	(25,825		)	(19,441		)	(22,765		)	(16,720		)
Core deposit intangible, net at beginning of period	21,873			28,257			24,933			15,721
Established through acquisitions	—			—			—			15,257
CDI current period amortization	(1,456		)	(1,667		)	(4,516		)	(4,388		)
Total core deposit intangible, net at end of period	20,417			26,590			20,417			26,590
Intangible assets not subject to amortization	919			919			919			919
Other intangible assets, net at end of period	21,336			27,509			21,336			27,509
Total goodwill and other intangible assets at end of period	$	365,288		$	371,461		$	365,288		$	371,461

Estimated Future Amortization Expense of Core Deposit Intangibles

The following table provides the estimated future amortization expense of core deposit intangibles for the remaining three months ending December 31, 2014 and the succeeding four years:

	Amount
	(in thousands)
Year ending December 31,
2014	$	1,447
2015	4,934
2016	4,195
2017	3,361
2018	2,500