Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Statutory rate	35.00%	35.00%	35.00%
Operating Loss Carryforwards	$ 49,300,000
Tax Credit Carryforward, Amount	9,800,000
Operating Loss Carryforwards, Expiration Dates	Sep. 15, 2030
Tax Credit Carryforward, Expiration Date	Sep. 15, 2020
Valuation allowance	22,860,000	16,391,000
Undistributed Earnings of Foreign Subsidiaries	202,600,000	167,900,000
Liability for Uncertain Tax Positions, Noncurrent	4,700,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,400,000	3,400,000	6,200,000
Income tax benefit	(31,612,000)	59,158,000	36,806,000
Income Tax Examination, Penalties and Interest Expense	200,000	200,000	200,000
Income Tax Examination, Penalties and Interest Accrued	1,300,000	1,100,000
Helix [Member]
Income Taxes [Line Items]
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions		(2,785,000)
Australian Subsidiary [Member]
Income Taxes [Line Items]
Income tax benefit			$ 31,300,000