Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning Balance	$ 80,322,000	$ 80,848,000
Foreign exchange adjustments	(77,000)	(526,000)
Ending Balance	80,245,000	80,322,000	$ 80,848,000
Accumulated goodwill impairment charges	23,500,000
Impairment recognized	0	0	0
Business [Member]
Goodwill [Roll Forward]
Beginning Balance	72,298,000	72,824,000
Foreign exchange adjustments	(77,000)	(526,000)
Ending Balance	72,221,000	72,298,000	72,824,000
Consumer [Member]
Goodwill [Roll Forward]
Beginning Balance	8,024,000	8,024,000
Foreign exchange adjustments	0	0
Ending Balance	$ 8,024,000	$ 8,024,000	$ 8,024,000