Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Deferred income taxes	$ 50,137,000	$ 52,582,000
Deferred Tax Assets, Gross	64,570,000	69,203,000
Deferred Tax Assets, Tax Credit Carryforwards	19,529,000	21,783,000
Foreign Tax Credit Carryforward Expire On 2020	1,000,000
Foreign Tax Credit Carryforward Expire On 2021	6,000,000
Foreign Tax Credit Carryforward Expire On 2022	300,000
Foreign Tax Credit Carryforward Expire On 2023	1,900,000
Deferred Tax, Operating Loss Carryforwards	4,310,000	4,886,000
Valuation Allowance	2,837,000	3,781,000
Unrecognized Tax Liability For Undistributed Foreign Earnings	3,400,000
Liability for uncertain tax positions	1,500,000	2,400,000
Increase (Decrease) in Uncertain Tax Liability	(1,000,000)
Accrued Interest And Penalties For Continued Operations	0
Income Tax Penalties and Interest Expense	300,000
Accrued Income Taxes Payable	600,000	600,000
Accrued Interest and Penalties for Discontinued Operations	500,000	500,000
State and Foreign
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	56,000,000	75,800,000
Deferred Tax, Operating Loss Carryforwards	4,300,000	4,900,000
Valuation Allowance	2,800,000	3,800,000
State
Operating Loss Carryforwards [Line Items]
Valuation Allowance Operating Loss Carryforwards Change In Amount	(800,000)
Foreign
Operating Loss Carryforwards [Line Items]
Valuation Allowance Operating Loss Carryforwards Change In Amount	(200,000)
Foreign Income Tax Credit | Foreign
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards	$ 9,200,000
Tax credit carryforward expiration period	10 years
Alternative Minimum Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	$ 10,300,000
Adjustments for New Accounting Principle, Early Adoption
Operating Loss Carryforwards [Line Items]
Deferred income taxes		$ 22,900,000