Notes and Bonds Payable (Details 5) (USD $)	6 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Mortgage Notes 7.765% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	$ 4,700,000
Effective Interest rate	7.765%	[1]
Maturity Date	2017-01
Collateral	MOB	[2]
Investment in Collateral	11,700,000
Mortgage notes payable carrying amount	1,800,000		1,900,000
Principal and interest payments	Monthly/20-yr amort.	[3]
Mortgage Notes 5.550% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	1,800,000
Effective Interest rate	5.55%	[1]
Maturity Date	2030-10
Collateral	OTH	[2]
Investment in Collateral	7,900,000
Mortgage notes payable carrying amount	1,600,000		1,600,000
Principal and interest payments	Monthly/27-yr amort.	[3]
Mortgage Notes 5.490% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	15,100,000
Effective Interest rate	5.49%	[1]
Maturity Date	2016-01
Collateral	MOB	[2]
Investment in Collateral	32,700,000
Mortgage notes payable carrying amount	12,900,000		13,100,000
Principal and interest payments	Monthly/10-yr amort.	[3]
Mortgage Notes 6.480% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	17,400,000	[4]
Effective Interest rate	6.48%	[1],[4]
Maturity Date	2015-05	[4]
Collateral	MOB	[2],[4]
Investment in Collateral	19,900,000	[4]
Mortgage notes payable carrying amount	14,600,000	[4]	14,500,000	[4]
Principal and interest payments	Monthly/10-yr amort.	[3],[4]
Mortgage Notes 6.110% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	12,000,000	[5]
Effective Interest rate	6.11%	[1],[5]
Maturity Date	2015-07	[5]
Collateral	2 MOBs	[2],[5]
Investment in Collateral	19,500,000	[5]
Mortgage notes payable carrying amount	9,800,000	[5]	9,800,000	[5]
Principal and interest payments	Monthly/10-yr amort.	[3],[5]
Mortgage Notes 7.650% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	15,200,000	[6]
Effective Interest rate	7.65%	[1],[6]
Maturity Date	2020-07	[6]
Collateral	MOB	[2],[6]
Investment in Collateral	20,200,000	[6]
Mortgage notes payable carrying amount	12,800,000	[6]	12,800,000	[6]
Principal and interest payments	-15	[3],[6],[7]
Mortgage Notes 6.810% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	1,500,000	[8]
Effective Interest rate	6.81%	[1],[8]
Maturity Date	2016-07	[8]
Collateral	MOB	[2],[8]
Investment in Collateral	2,100,000	[8]
Mortgage notes payable carrying amount	1,100,000	[8]	1,100,000	[8]
Principal and interest payments	Monthly/9-yr amort.	[3],[8]
Mortgage Notes 6.430% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	12,900,000	[9]
Effective Interest rate	6.43%	[1],[9]
Maturity Date	2021-02	[9]
Collateral	MOB	[2],[9]
Investment in Collateral	20,600,000	[9]
Mortgage notes payable carrying amount	11,300,000	[9]	11,400,000	[9]
Principal and interest payments	Monthly/12-yr amort.	[3],[9]
Mortgage Notes 7.250% [Member] | Investment Fund [Member]
Further details of company's mortgage notes payable
Mortgage notes	80,000,000
Effective Interest rate	7.25%	[1]
Maturity Date	2016-12
Collateral	15 MOBs	[2]
Investment in Collateral	155,000,000
Mortgage notes payable carrying amount	78,000,000		78,400,000
Principal and interest payments	Monthly/30-yr amort.(16)	[10],[3]
Mortgage Notes 5.530% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	7,000,000
Effective Interest rate	5.53%	[1]
Maturity Date	2018-01
Collateral	MOB	[2]
Investment in Collateral	14,500,000
Mortgage notes payable carrying amount	3,300,000		3,500,000
Principal and interest payments	Monthly/15-yr amort.	[3]
Mortgage Notes 6.550% [Member] | Investment Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	15,900,000	[11]
Effective Interest rate	6.55%	[1],[11]
Maturity Date	2013-04	[11]
Collateral	MOB	[11],[2]
Investment in Collateral	23,300,000	[11]
Mortgage notes payable carrying amount	15,000,000	[11]	15,200,000	[11]
Principal and interest payments	Monthly/30-yr amort.(17)	[11],[12],[3]
Mortgage Notes 5.250% [Member] | Investment Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	4,600,000
Effective Interest rate	5.25%	[1]
Maturity Date	2015-09
Collateral	MOB	[2]
Investment in Collateral	6,900,000
Mortgage notes payable carrying amount	4,300,000		4,300,000
Principal and interest payments	Monthly/10-yr amort.	[3]
Mortgage Notes 4.700% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	13,900,000	[13]
Effective Interest rate	4.70%	[1],[13]
Maturity Date	2016-01	[13]
Collateral	MOB	[13],[2]
Investment in Collateral	26,400,000	[13]
Mortgage notes payable carrying amount	12,100,000	[13]	12,400,000	[13]
Principal and interest payments	Monthly/25-yr amort.	[13],[3]
Mortgage Notes 4.700% [Member] | Life Insurance Company - I [Member]
Further details of company's mortgage notes payable
Mortgage notes	21,500,000	[14]
Effective Interest rate	4.70%	[1],[14]
Maturity Date	2015-08	[14]
Collateral	MOB	[14],[2]
Investment in Collateral	43,800,000	[14]
Mortgage notes payable carrying amount	18,500,000	[14]	18,800,000	[14]
Principal and interest payments	Monthly/25-yr amort.	[14],[3]
Mortgage Notes 5.100% [Member] | Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	7,300,000	[15]
Effective Interest rate	5.10%	[1],[15]
Maturity Date	2018-12	[15]
Collateral	MOB	[15],[2]
Investment in Collateral	14,600,000	[15]
Mortgage notes payable carrying amount	7,400,000	[15]	7,500,000	[15]
Principal and interest payments	Monthly/25-yr amort.	[15],[3]
Mortgage Notes 4.540% [Member] | Commercial Bank [Member]
Further details of company's mortgage notes payable
Mortgage notes	8,100,000	[16]
Effective Interest rate	4.54%	[1],[16]
Maturity Date	2016-08	[16]
Collateral	MOB	[16],[2]
Investment in Collateral	15,100,000	[16]
Mortgage notes payable carrying amount	7,600,000	[16]	7,700,000	[16]
Principal and interest payments	Monthly/10-yr amort.	[16],[3]
Mortgage Notes 4.060% [Member] | Life Insurance Co. [Member]
Further details of company's mortgage notes payable
Mortgage notes	5,300,000	[17],[18]
Effective Interest rate	4.06%	[1],[17],[18]
Maturity Date	2014-11	[17],[18]
Collateral	MOB	[17],[18],[2]
Investment in Collateral	11,600,000	[17],[18]
Mortgage notes payable carrying amount	4,600,000	[17],[18]	4,800,000	[17],[18]
Principal and interest payments	Monthly/25-yr amort.	[17],[18],[3]
Mortgage Notes 4.060% [Member] | Life Insurance Company - I [Member]
Further details of company's mortgage notes payable
Mortgage notes	3,100,000	[16]
Effective Interest rate	4.06%	[1],[16]
Maturity Date	2014-11	[16]
Collateral	MOB	[16],[2]
Investment in Collateral	6,700,000	[16]
Mortgage notes payable carrying amount	2,700,000	[16]	2,800,000	[16]
Principal and interest payments	Monthly/25-yr amort.	[16],[3]
Mortgage Notes Payable [Member]
Further details of company's mortgage notes payable
Investment in Collateral	452,500,000
Mortgage notes payable carrying amount	$ 219,383,000		$ 221,649,000

[1] The contractual interest rates for the 19 outstanding mortgage notes ranged from 5.00% to 7.625% at June 30, 2012.

[2] MOB-Medical office building; OTH-Other.

[3] Payable in monthly installments of principal and interest with the final payment due at maturity (unless otherwise noted).

[4] The unaccreted portion of a $2.7 million discount recorded on this note upon acquisition is included in the balance above.

[5] The unaccreted portion of a $2.1 million discount recorded on this note upon acquisition is included in the balance above.

[6] The unaccreted portion of a $2.4 million discount recorded on this note upon acquisition is included in the balance above.

[7] Payable in monthly installments of interest only for 24 months and then installments of principal and interest based on an 11-year amortization with the final payment due at maturity.

[8] The unaccreted portion of a $0.2 million discount recorded on this note upon acquisition is included in the balance above.

[9] The unaccreted portion of a $1.0 million discount recorded on this note upon acquisition is included in the balance above.

[10] The Company has the option to extend the maturity for two, one-year floating rate extension terms

[11] The unamortized portion of a $0.5 million premium recorded on this note upon acquisition is included in the balance above.

[12] The Company has the option to extend the maturity for three years at a fixed rate of 6.75%.

[13] The unamortized portion of a $0.3 million premium recorded on this note upon acquisition is included in the balance above.

[14] The unamortized portion of a $0.4 million premium recorded on this note upon acquisition is included in the balance above.

[15] The unamortized portion of a $0.6 million premium recorded on this note upon acquisition is included in the balance above.

[16] The unamortized portion of a $0.2 million premium recorded on this note upon acquisition is included in the balance above.

[17] The unamortized portions of a $0.3 million premium recorded on these notes upon acquisition are included in the balance above.

[18] The balance consists of two notes secured by the same building.