Transactions with Related Parties Transactions with Related Parties Narrative (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2013 entities properties	Dec. 31, 2012 properties	Dec. 31, 2011	Dec. 31, 2013 Majority-Owned Subsidiary, Unconsolidated [Member]	Dec. 31, 2012 Majority-Owned Subsidiary, Unconsolidated [Member]	Dec. 31, 2011 Majority-Owned Subsidiary, Unconsolidated [Member]	Dec. 31, 2013 Affiliated Entity [Member]	Dec. 31, 2012 Affiliated Entity [Member]	Dec. 31, 2011 Affiliated Entity [Member]	Dec. 31, 2013 Eagle Ridge [Member] Affiliated Entity [Member]	Jun. 30, 2012 Trust Portfolio--PHCFT [Member]	Jun. 30, 2012 Available-for-sale Securities [Member] Arbors at Hickory Ridge [Member]	Dec. 31, 2012 Trust Portfolio--MBS Bonds [Member]	Dec. 31, 2013 Variable Interest Entity, Primary Beneficiary [Member] Integer	Sep. 30, 2012 Total Owners [Member] Variable Interest Entity, Primary Beneficiary [Member] properties
rate for administration fees			0.45%
Payment for Administrative Fees						$ 1,500,000	$ 948,000	$ 795,000	$ 144,000	$ 133,000	$ 160,000	$ 71,000
Fees and Commissions			2,000,000
Debt Instrument, Unamortized Premium													653,000	100,000	316,000
Fees and Commissions, Other	1,200,000	1,400,000			407,000
Construction Revenue	672,000
Management Fees Revenue			$ 1,200,000	$ 1,200,000	$ 1,100,000
Number of Variable Interest Entities			4	5												2	2