Goodwill and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill

Changes in the carrying amount of goodwill for the years ended December 31, 2017 and 2016 are as follows (in thousands):

	December 31,
	2017		2016
Balance at beginning of year	$	182,012	$	179,792
Translation adjustments	5,231		2,220
Balance at end of year	$	187,243	$	182,012

Summary of the Company’s intangible assets other than goodwill

The following is a summary of the Company’s intangible assets other than goodwill (in thousands):

		December 31,
	Amortization Period	2017			2016
Amortized intangible assets:
Cost:
Customer relationships	10 years	$	42,073		$	41,419
Internally developed software	7 years	7,412			6,925
		49,485			48,344
Accumulated amortization:
Customer relationships		(42,073		)	(40,901		)
Internally developed software		(7,412		)	(6,925		)
		(49,485		)	(47,826		)
Net book value		—			518
Indefinite-lived intangible assets:
Trade names		900			900
Total intangible assets at net book value		$	900		$	1,418