Notes Payable (Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Detail of interest expensed and incurred
Total interest incurred	$ 5,268	$ 6,337	$ 14,602	$ 19,395
Interest capitalized	(119)	(544)	(277)	(1,459)
Total interest expense	$ 5,149	$ 5,793	$ 14,325	$ 17,936