Debt (Schedule of Interest Expense, Net) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest expense:
Contractual and other interest expense	[1]	$ 45,800	$ 43,500	$ 37,600
Accretion of senior convertible note discount		0	4,000	5,200
Amortization of deferred financing costs		2,900	3,400	4,000
Total interest expense		48,700	50,900	46,800
Interest income		(600)	(100)	(400)
Interest expense, net		48,055	$ 50,769	$ 46,442
Financing Receivable [Member] | Interest Expense [Member]
Debt Instrument [Line Items]
Non-recourse financing arrangement, discount fees		1,600
4.875% Senior Notes [Member] | Senior Notes [Member] | Interest Expense [Member]
Debt Instrument [Line Items]
Debt instrument, payments for consent fee, solicitation agent		$ 800

[1] Contractual and other interest expense for the year ended December 31, 2015 includes $0.8 million of consent solicitation agent fees related to the delay in filing of the Company’s 2014 Form 10-K and its First Quarter 2015 Form 10-Q, as well as $1.6 million of discount fees related to financing arrangements.