Supplemental Disclosures (Narrative) (Details) (USD $)	3 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Feb. 18, 2014	Feb. 18, 2014 ARN [Member]	Dec. 31, 2013 ARN [Member]	Mar. 31, 2014 ARN [Member]	Feb. 18, 2014 ARN [Member] Realized Foreign Exchange Gain Loss on Sale [Member]
Equity Method Investments [Line Items]
Percentage of ownership	100.00%				50.00%
Impairment of equity method investment					$ 95,400,000
Loss on sale of equity method investment				2,400,000			11,500,000
Date of sale of equity method investment			February 18, 2014
Reclassification of AOCI due to the sale of equity method investment	3,309,000	(998,000)
Percentage of ownership disposed						50.00%
Supplemental Disclosures [Abstract]
Effective tax rate	(18.80%)	31.50%
Income tax refunds	$ 3,500,000	$ 400,000