Notes Payable (Interest Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Disclosure [Abstract]
Document Fiscal Year Focus	2013
Total interest incurred	$ 22,227	$ 25,570	$ 27,277
Interest capitalized	(518)	(1,637)	(600)
Total interest expense	$ 21,709	$ 23,933	$ 26,677