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Accounting Policies (Consolidation & Other) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Redeemable OP Unitholder Interests
Unit conversion factor for common stock	0.7866vtr_UnitConversionFactorForCommonStock
Fair value of Redeemable OP Unitholder	159,100	$ 111,600
Class A Units
Redeemable OP Unitholder Interests
Limited partnership units held by third party investors (in shares)	2,821,627
Class B Units
Redeemable OP Unitholder Interests
Limited partnership units outstanding (in shares)	6,710,261
NHP/PMB L.P. \| Class A Units
Redeemable OP Unitholder Interests
Percentage of ownership interest on total units outstanding	29.60%
NHP/PMB L.P. \| Class B Units
Redeemable OP Unitholder Interests
Percentage of ownership interest on total units outstanding	70.40%

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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