Notes Payable (Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Detail of interest expensed and incurred
Total interest incurred	$ 7,540	$ 5,036
Interest capitalized	(373)	(101)
Total interest expense	$ 7,167	$ 4,935