Subsequent Events/Other (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 29, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Other [Line Items]
Sales Price		$ 6,342,408
Apartment Units		26,162
Business Combination, Acquisition Related Costs		$ 1,300	$ 100
Noncash Project Abandonment Costs		1,448	493
Other Expenses		2,800	600
Real Estate [Member]
Other [Line Items]
Noncash Project Abandonment Costs		1,500	$ 500
Bonds [Member]
Other [Line Items]
Repayments Of Long-term Debt		$ 41,800
Subsequent Event [Member] | Bonds [Member]
Other [Line Items]
Repayments Of Long-term Debt	$ 2,900
Military Housing [Member] | Subsequent Event [Member]
Other [Line Items]
Sales Price	$ 63,300
Apartment Units	5,161