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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
The following table summarizes the changes in the Company's other intangible assets for the year ended December 31, 2017, and the three months ended March 31, 2018.
(in thousands)
Other Intangible Assets
 
Gross
Accumulated Amortization
Net
Balance, December 31, 2016
$
113,471

$
(76,585
)
$
36,886

Amortization
—

(6,756
)
(6,756
)
Balance, December 31, 2017
113,471

(83,341
)
30,130

Amortization
—

(1,541
)
(1,541
)
Balance, March 31, 2018
$
113,471

$
(84,882
)
$
28,589
Finite-lived Intangible Assets Amortization Expense
The table below presents the forecasted amortization expense for other intangible assets acquired in all mergers:
(in thousands)
 
Year
Expected Amortization
Remainder of 2018
$
4,625

2019
5,618

2020
4,986

2021
4,520

2022
4,095

Thereafter
4,745

 
$
28,589