Notes Payable (Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Detail of interest expensed and incurred
Total interest incurred	$ 8,156	$ 8,580
Interest capitalized	(742)	(903)
Total interest expense	$ 7,414	$ 7,677