Acquisitions and Exit Activities Disposition (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal, tax benefit	$ (1,404,000)	$ 0	$ 0
Ijie Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Disposition of TK Investment, Percent of Issued Share Capital Sold	95.00%
Disposal Group, Including Discontinued Operation, Consideration	1.00
Loss (Gain) on Write-down	1,000,000
Disposal costs	400,000
Cumulative translation adjustment	300,000
Loss on disposal, tax benefit	1,400,000
Loss on disposal, net of tax	3,200,000
Other Nonoperating Income (Expense) | Ijie Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal	$ 1,800,000
TK Investment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Disposition of TK Investment, Percent of Issued Share Capital Retained	5.00%