Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Statutory rate	35.00%	35.00%	35.00%
Valuation allowance	$ 23,076,000	$ 22,860,000
Undistributed earnings of foreign subsidiaries	338,000,000	202,600,000
Unrecognized tax benefits that would impact effective tax rate		3,400,000	3,400,000
Income tax examination, penalties and interest expense	(1,300,000)	200,000	200,000
Income tax examination, penalties and interest accrued		1,300,000
Unrecognized tax benefit, decrease resulting from settlements with taxing authorities	3,400,000
Income tax refund	35,200,000
Helix [Member]
Income Taxes [Line Items]
Reductions for tax positions of prior years	$ 4,723,000		$ 2,785,000