Debt Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Interest Expense [Abstract]
Interest expense	$ 34,573	$ 23,878	$ 8,944
Capitalized interest	357	576	378
Amortization of debt issuance costs and bond discount	3,413	2,580	247
Unamortized debt premium written off as a result of debt payoff	0	(1,655)	0
Debt issuance costs expensed due to credit facility modifications	0	2,145	416
Total interest expense	$ 37,629	$ 26,372	$ 9,229