Notes Payable (Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Detail of interest expensed and incurred
Total interest incurred	$ 7,667	$ 5,268	$ 22,787	$ 14,602
Interest capitalized	(850)	(119)	(1,833)	(277)
Total interest expense	$ 6,817	$ 5,149	$ 20,954	$ 14,325