Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Interest Expense [Abstract]
Interest expense	$ 9,991	$ 8,511	$ 19,505	$ 16,223
Interest Costs Capitalized Adjustment	(196)	(84)	(316)	(204)
Amortization of Debt Issuance Costs	871	860	1,739	1,680
Total interest expense	$ 10,666	$ 9,287	$ 20,928	$ 17,699