Carrying amount, attributable to noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

No definition available.

Name:	us-gaap_TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Accounting Policies (Consolidation & Other) (Details) (USD $) In Thousands, except Share data, unless otherwise specified					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Class A Units	Dec. 31, 2013 Class B Units	Dec. 31, 2013 NHP/PMB L.P. Class A Units	Dec. 31, 2013 NHP/PMB L.P. Class B Units
Redeemable OP Unitholder Interests
Limited partnership units held by third party investors (in shares)			2,451,878
Percentage of ownership interest on total units outstanding					28.10%	71.90%
Limited partnership units outstanding (in shares)				6,287,831
Unit conversion factor for common stock	0.7866
Fair value of Redeemable OP Unitholder	$ 111,600	$ 114,900