Debt (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Interest Expense [Abstract]
Interest expense	$ 9,515	$ 7,712
Interest Costs Capitalized	121	120
Amortization of debt issuance costs, debt discount and premium	868	820
Total interest expense	$ 10,262	$ 8,412