Notes Payable (Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Detail of interest expensed and incurred
Total interest incurred	$ 7,580	$ 4,298	$ 15,120	$ 9,334
Interest capitalized	(610)	(57)	(983)	(158)
Total interest expense	$ 6,970	$ 4,241	$ 14,137	$ 9,176