Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Intangible Assets Gross Excluding Goodwill [Abstract]

Schedule of Other Intangible Assets

Other intangible assets consist of the following:

(in thousands)	June 30, 2018			December 31, 2017
Finite-lived intangible assets:
Customer relationships	$	108,931		$	106,086
Noncompete agreements		11,227			11,509
Trademarks		8,227			9,229
Internal-use software licenses		26,182			28,956
Patents		2,840			2,840
		157,407			158,620
Accumulated amortization		(70,033	)		(75,591	)
		87,374			83,029
Indefinite-lived intangible assets:
Licenses		16,884			16,884
	$	104,258		$	99,913

Estimated Amortization Expense for Finite-Lived Intangible Assets

Estimated amortization expense for finite-lived intangible assets for the next five years is as follows:

Year	(in thousands)
Remainder of 2018	$	12,842
2019	$	18,264
2020	$	11,889
2021	$	9,023
2022	$	8,573
2023	$	8,519