Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Accounting Policies [Abstract]
Minimum likelihood of being realized upon settlement of uncertain tax positions	50.00%
Health Insurance
Health insurance maximum risk of loss liability per employee insurance plan (up to)	$ 350,000
Health insurance maximum aggregate amount of risk of loss liability for employee insurance plans (up to)	$ 700,000
Earnings per Share
Common stock equivalents (in shares)	286	149
Anti-dilutive common stock equivalents (in shares)	0	0
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative expenses	$ 84,678,000	$ 85,455,000
Other expense, net	1,185,000	668,000
Cash provided by operating activities	(10,513,000)	3,341,000
Deferred tax assets, net, noncurrent	$ 21,991,000		$ 23,449,000
Percent of timing of revenue recognition not impacted by new accounting pronouncement	95.00%
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption			(469,000)
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefits from share-based compensation	$ 200,000
Decrease in effective income tax rate	2.40%
Increase to earnings per share (in dollars per share)	$ 0.01
Deferred tax assets, net	$ 300,000
Cash provided by operating activities	200,000	300,000
Accounting Standards Update 2016-09 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	500,000
Accounting Standards Update 2015-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets, net, current			(4,800,000)
Deferred tax assets, net, noncurrent			$ 4,800,000
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general and administrative expenses	(100,000)	(100,000)
Other expense, net	$ 100,000	$ 100,000