INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

INTANGIBLE ASSETS

Schedule of carrying amount of intangible assets, net of accumulated amortization and impairment charges

	2017
	Gross
	Carrying				Accumulated		Currency		Net Book
	Amount		Acquisitions		Amortization		impact		Value
Amortizable intangibles:
Customer relationships	$	73,723	$	—	$	(55,844)	$	(105)	$	17,774
Noncompete agreements		5,952		—		(5,754)		1		199
Software		1,583		—		(1,520)		(63)		—
Backlog		5,002		—		(4,981)		(21)		—
Databases		13,135		—		(5,475)		(98)		7,562
Trademark and trade names		1,250		—		(1,101)		—		149
Intangibles	$	100,645	$	—	$	(74,675)	$	(286)	$	25,684

	2016
	Gross
	Carrying				Accumulated		Currency		Net Book
	Amount		Acquisitions		Amortization		impact		Value
Amortizable intangibles:
Customer relationships	$	54,450	$	19,273	$	(47,303)	$	(151)	$	26,269
Noncompete agreements		5,670		282		(5,686)		(1)		265
Software		1,583		—		(1,501)		(78)		4
Backlog		5,002		—		(4,974)		(28)		—
Databases		5,444		7,691		(4,774)		(113)		8,248
Trademark and trade names		1,250		—		(923)		—		327
Intangibles	$	73,399	$	27,246	$	(65,161)	$	(371)	$	35,113

Schedule of estimated future amortization expense

2018	$	4,942
2019		3,972
2020		3,397
2021		2,198
2022		1,757
Thereafter		9,418
	$	25,684