Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Beginning Balance	$ 80,531,000	$ 80,245,000
Acquisitions	14,606,000
Foreign exchange adjustments	(106,000)	286,000
Ending Balance	95,031,000	80,531,000	$ 80,245,000
Accumulated goodwill impairment charges	23,500,000
Impairment recognized	0	0	0
Business [Member]
Goodwill [Roll Forward]
Beginning Balance	72,507,000	72,221,000
Acquisitions	14,606,000
Foreign exchange adjustments	(106,000)	286,000
Ending Balance	87,007,000	72,507,000	72,221,000
Consumer
Goodwill [Roll Forward]
Beginning Balance	8,024,000	8,024,000
Acquisitions	0
Foreign exchange adjustments	0	0
Ending Balance	$ 8,024,000	$ 8,024,000	$ 8,024,000