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Goodwill and Other Intangible Assets
6 Months Ended
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets

The following tables summarize the changes in the Company's goodwill and other intangible assets for the year ended December 31, 2015, and the six months ended June 30, 2016. Goodwill and all other intangible assets are related to the Community Banking segment.
(in thousands)
Goodwill
 
 
Accumulated
 
 
Gross
Impairment
Total
Balance, December 31, 2014
$
1,899,159

$
(112,934
)
$
1,786,225

Net additions
1,568


1,568

Balance, December 31, 2015
1,900,727

(112,934
)
1,787,793

Reductions

(142
)
(142
)
Balance, June 30, 2016
$
1,900,727

$
(113,076
)
$
1,787,651



Goodwill represents the excess of the total acquisition price paid over the fair value of the assets acquired, net of the fair values of liabilities assumed. The reduction to goodwill of $142,000 relates to a goodwill impairment loss recognized during the first quarter related to a small subsidiary that is winding down operations. The additions to goodwill in 2015 of $1.6 million related to correcting immaterial errors in acquisition accounting adjustments.
(in thousands)
Other Intangible Assets
 
 
Accumulated
 
 
Gross
Amortization
Net
Balance, December 31, 2014
$
113,471

$
(56,738
)
$
56,733

Amortization

(11,225
)
(11,225
)
Balance, December 31, 2015
113,471

(67,963
)
45,508

Amortization

(4,888
)
(4,888
)
Balance, June 30, 2016
$
113,471

$
(72,851
)
$
40,620



Core deposit intangible assets values were determined by an analysis of the cost differential between the core deposits inclusive of estimated servicing costs and alternative funding sources for core deposits acquired through acquisitions. The core deposit intangible assets are amortized on an accelerated basis over a period of approximately 10 years.

The Company conducts its annual evaluation of goodwill for impairment as of its year end of December 31. Goodwill and other intangibles are required to be analyzed for impairment if certain triggering events occur. During the six months ended June 30, 2016, management determined that no triggering events occurred that required an impairment analysis. The table below presents the forecasted amortization expense for other intangible assets acquired in all mergers:
(in thousands)
 
 
Expected
Year
Amortization
Remainder of 2016
$
3,734

2017
6,756

2018
6,166

2019
5,618

2020
4,986

Thereafter
13,360

 
$
40,620