Debt (Schedule of Interest Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest expense:
Contractual and other interest expense	$ 10,800	$ 9,700
Accretion of senior convertible note discount	0	1,400
Amortization of deferred financing costs	600	900
Total interest expense	11,400	12,000
Interest income	(400)	0
Interest expense, net	$ 10,973	$ 12,003