Debt (Schedule of Interest Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest expense:
Contractual and other interest expense						$ 43,500	$ 37,600	$ 29,200
Accretion of senior convertible note discount						4,000	5,200	4,900
Amortization of deferred financing costs						3,400	4,000	3,700
Total interest expense						50,900	46,800	37,800
Interest income						(100)	(400)	(400)
Interest expense, net	$ 12,643	$ 12,949	$ 12,003	$ 24,952	$ 37,595	$ 50,769	$ 46,442	$ 37,376