Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of Interest Expense [Abstract]
Interest expense	$ 9,000	$ 6,426	$ 25,223	$ 17,126
Interest Costs Capitalized	92	156	296	367
Amortization of Financing Costs	864	735	2,544	1,816
Write-off of debt issuance costs	0	0	0	2,145
Total interest expense	$ 9,772	$ 7,005	$ 27,471	$ 20,720