Summary of Significant Accounting Policies - Part Two (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Class of Stock [Line Items]
Fair value of assets held for sale	$ 11,750
Cash proceeds from sale of property	14,678
Proceeds from sales of property and equipment	12	0
Non-controlling interest in joint ventures	16,111		15,633
Non-controlling interest capital contributions	185
Net income (loss) attributable to non-controlling interest	293	0
Affiliated Entity [Member] | ARIZONA
Class of Stock [Line Items]
Proceeds from sales of property and equipment	13,850
Gain on sale of Property	$ 2,315