Income Taxes - Additional Information (Details) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Foreign Tax Authority	Dec. 31, 2013 Foreign Tax Authority	Dec. 31, 2012 Foreign Tax Authority	Dec. 31, 2013 Federal, State, Foreign	Dec. 31, 2012 Federal, State, Foreign	Dec. 31, 2013 State and Foreign	Dec. 31, 2012 State and Foreign	Dec. 31, 2013 Alternative Minimum Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Increase (Decrease) in Uncertain Tax Liability	$ 0	$ 736,000
Liability for Uncertain Tax Positions, Noncurrent		1,800,000	1,100,000
Accrued Interest And Penalties For Continued Operations		20,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		200,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		293,000
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount		0	0	103,000
Disposal Group, Including Discontinued Operation, Accrued Income Taxes Payable		636,000	636,000
Accrued Interest and Penalties for Discontinued Operations		450,000	418,000
Deferred Tax Assets, Gross		76,970,000	82,200,000		1,713,000	1,713,000	990,000
Tax Credit Carryforward, Valuation Allowance					10,900,000	10,900,000	13,400,000
Increase (Decrease) in Tax Credit Carryforward						1,900,000
Valuation Allowance, Deferred Tax Asset, Change in Amount					4,100,000	1,900,000
Increase (Decrease) in Deferred Income Taxes		2,200,000				2,500,000
Deferred Tax Asset, Increase (Decrease) during the period		300,000
Operating Loss Carryforwards								96,000,000	82,000,000
Deferred Tax Assets, Operating Loss Carryforwards		4,794,000	1,755,000					4,800,000	1,800,000
Valuation Allowance Operating Loss Carryforwards Change In Amount										329,000
Deferred Tax Assets, Valuation Allowance		12,393,000	14,576,000							1,500,000	1,200,000
Tax Credit Carryforward, Amount												11,300,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign		15,000,000
Foreign Tax Credit Carryforward Expire On Two Thousand Nineteen					222,000	222,000
Foreign Tax Credit Carryforward Expire On Two Thousand Twenty					8,300,000	8,300,000
Foreign Tax Credit Carryforward Expire On Two Thousand Twenty One					4,400,000	4,400,000
Foreign Tax Credit Carryforward Expire On Two Thousand Twenty Two					2,100,000	2,100,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business		622,000
Unrecognized Tax Liability For Undistributed Foreign Earnings		1,000,000
Tax deficiencies from share-based compensation		$ 404,000	$ 96,000	$ (325,000)