Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The following table shows the changes in the carrying amount of goodwill by segment for the three months ended March 31, 2015 and 2014:

(dollars in thousands)	Banking		Insurance		Other		Total
Balance at January 1, 2015	$	490,972	$	39,873	$	—	$	530,845
Goodwill acquired during the period		55,969		1,090		—		57,059
Balance at March 31, 2015	$	546,941	$	40,963	$	—	$	587,904
Balance at January 1, 2014	$	312,856	$	39,873	$	—	$	352,729
Goodwill acquired during the period		—		—		—		—
Balance at March 31, 2014	$	312,856	$	39,873	$	—	$	352,729

Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets

The gross carrying amount and accumulated amortization of other intangible assets at March 31, 2015 and December 31, 2014 was as follows:

(dollars in thousands)	Gross Carrying Amount		Accumulated Amortization and Impairment			Net Carrying Amount
March 31, 2015
Amortized intangible assets:
Core deposit	$	60,103	$	(38,833	)	$	21,270
Customer business relationships		30,552		(21,915	)		8,637
Customer trust relationships		16,547		(3,853	)		12,694
Customer loan relationships		4,413		(3,276	)		1,137
Total intangible assets	$	111,615	$	(67,877	)	$	43,738
December 31, 2014
Amortized intangible assets:
Core deposit	$	57,149	$	(36,950	)	$	20,199
Customer business relationships		27,942		(21,438	)		6,504
Customer trust relationships		13,986		(3,232	)		10,754
Customer loan relationships		4,413		(3,176	)		1,237
Total intangible assets	$	103,490	$	(64,796	)	$	38,694

Schedule of Estimated Amortization Expense for Future Years

Estimated amortization expense for future years is as follows:

(dollars in thousands)
2015 remaining	$	8,619
2016		9,825
2017		7,547
2018		5,786
2019		4,347
Thereafter		7,614
Total	$	43,738