Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Interest Expense [Abstract]
Interest expense	$ 10,087	$ 9,000	$ 29,592	$ 25,223
Interest Costs Capitalized Adjustment	(144)	(92)	(460)	(296)
Amortization of Debt Issuance Costs	873	864	2,613	2,544
Total interest expense	$ 10,816	$ 9,772	$ 31,745	$ 27,471