Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Intangible Assets Gross Excluding Goodwill [Abstract]

Schedule of Other Intangible Assets

Other intangible assets consist of the following:

	December 31,
	2015			2014
	(in thousands)
Finite-lived intangible assets:
Customer relationships	$	93,572		$	94,850
Noncompete agreements		26,963			27,286
Trademarks		9,341			11,241
Patents		2,840			2,840
		132,716			136,217
Accumulated amortization		(101,479	)		(97,282	)
		31,237			38,935
Indefinite-lived intangible assets:
Licenses		16,877			16,877
	$	48,114		$	55,812

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)
2016	$	8,186
2017	$	7,040
2018	$	4,601
2019	$	3,807
2020	$	2,257