Leadership Changes and Restructuring Activities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses	$ 1,055,000	$ 1,091,000
Equity-based compensation expense	2,330,000	1,453,000	$ 2,002,000
Selling, General and Administrative Expenses [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses	1,055,000	$ 1,091,000	4,848,000
Retirement Agreement
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance period		24 months
Retirement Agreement | Accounts Payable and Accrued Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Reserve for severance and related benefits current	175,000	$ 250,000
Retirement Agreement | Other liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Reserve for severance and related benefits noncurrent	0	175,000
Separation Agreement | Selling, General and Administrative Expenses [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses	12,000
Equity-based compensation expense			1,007,000
Expected restructuring costs			3,581,000
Severance and related benefits recognized to date	3,569,000
Separation Agreement | Accounts Payable and Accrued Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Reserve for severance and related benefits current	789,000	759,000
Separation Agreement | Other liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Reserve for severance and related benefits noncurrent	0	789,000
Former Chief Financial Officer and Chief Operating Officer | Separation And Transition Agreement | Selling, General and Administrative Expenses [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses	1,043,000
Equity-based compensation expense	331,000
President | Retirement Agreement
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses		877,000
Equity-based compensation expense		$ 216,000
Former Chief Executive Officer | Separation Agreement
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance period		36 months
Restricted Stock Units (RSUs)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Equity-based compensation expense	$ 2,330,000	$ 1,453,000	2,002,000
Restructuring Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Severance and other related expenses			$ 1,303,000