Commitments And Contingencies (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Commitments And Contingencies [Line Items]
Total debt of unconsolidated joint ventures and entities	$ 644,000	$ 703,000
Share of unconsolidated debt, based on ownership percentage	215,000	234,000
Amount of financing required for equipment lease	15,500,000
Australia [Member]
Commitments And Contingencies [Line Items]
Cost to purchase equipment	8,600,000
New Zealand [Member]
Commitments And Contingencies [Line Items]
Cost to purchase equipment	$ 2,500,000