Subsequent Events (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended	0 Months Ended	1 Months Ended			3 Months Ended
	Dec. 31, 2014	Feb. 09, 2015	Feb. 25, 2015	Jan. 29, 2015	Jan. 30, 2015	Mar. 31, 2015	Jun. 30, 2015
Description For Acquire Sellers Remaining Interests	Following the consummation of the Initial Closing, the Company holds a 100% interest in 27 of the properties in the Copper Beech Portfolio, an 85% interest in one property in the Copper Beech Portfolio, an 86% interest in one property in the Copper Beech Portfolio and a 48% interest in 4 of the properties in the Copper Beech Portfolio and has no ownership interests in 2 of the properties in the Copper Beech Portfolio and has a 100% interest in Copper Beech at Ames, Iowa. The Company expects to complete the acquisition of the Sellers interests
Cash paid to Sellers	$ 58.9
Operating Partnership Issued To The Sellers	10.4
Second Amendment [Member]
Cash paid to Sellers	1.4
Operating Partnership Issued To The Sellers	2.0
Subsequent Event [Member]
Proceeds from Sale of Other Assets		3.8		28.4	2.9
Debt Instrument, Covenant Description			Maximum Leverage Ratio of not greater than 0.65:1.00; Maximum Secured Debt Ratio of not greater than 47.5%; Minimum Fixed Charge Ratio of not less than 1.30:1.00; and a Dividend Payout Ratio of not more than 105.0% calculated on a pro forma basis that applies the current quarterly dividend of $0.090 on a trailing twelve month basis.
Gain (Loss) on Disposition of Other Assets						4.7
Subsequent Event [Member] | Grove At Conway Ar [Member]
Proceeds from Sale of Other Assets							11.0
Subsequent Event [Member] | Grove At Lawrence Ks [Member]
Proceeds from Sale of Other Assets							$ 13.0