Mortgage Loans on Real Estate (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
First mortgage loans [Member]
Mortgage Loans on Real Estate
Prior Liens	$ 120,543,000
Face Amount of Mortgages	818,047,000
Carrying Amount of Mortgages	635,492,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 1
Mortgage Loans on Real Estate
Interest Rate	7.00%
Final Maturity Date	Apr. 19, 2018
Periodic Payment Amount	$ 127,412
Prior Liens	0
Face Amount of Mortgages	21,382,000
Carrying Amount of Mortgages	21,382,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 2
Mortgage Loans on Real Estate
Interest Rate	7.00%
Final Maturity Date	Nov. 21, 2018
Periodic Payment Amount	$ 121,437
Prior Liens	0
Face Amount of Mortgages	20,497,000
Carrying Amount of Mortgages	20,497,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | Massachusetts 1
Mortgage Loans on Real Estate
Interest Rate	7.86%
Final Maturity Date	Dec. 31, 2016
Periodic Payment Amount	$ 35,434
Prior Liens	0
Face Amount of Mortgages	21,000,000
Carrying Amount of Mortgages	5,316,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 3
Mortgage Loans on Real Estate
Interest Rate	7.00%
Final Maturity Date	Dec. 31, 2019
Periodic Payment Amount	$ 55,858
Prior Liens	0
Face Amount of Mortgages	27,133,000
Carrying Amount of Mortgages	9,737,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 4 [Member]
Mortgage Loans on Real Estate
Interest Rate	8.25%
Final Maturity Date	Jun. 11, 2019
Periodic Payment Amount	$ 14,973
Prior Liens	0
Face Amount of Mortgages	15,262,000
Carrying Amount of Mortgages	2,216,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 5 [Member]
Mortgage Loans on Real Estate
Interest Rate	8.00%
Final Maturity Date	Jul. 31, 2019
Periodic Payment Amount	$ 4,737
Prior Liens	0
Face Amount of Mortgages	22,119,000
Carrying Amount of Mortgages	1,629,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 6 [Member]
Mortgage Loans on Real Estate
Interest Rate	8.50%
Final Maturity Date	May 01, 2016
Periodic Payment Amount	$ 39,496
Prior Liens	0
Face Amount of Mortgages	9,721,000
Carrying Amount of Mortgages	6,429,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | United Kingdom 7 [Member]
Mortgage Loans on Real Estate
Interest Rate	7.54%
Final Maturity Date	Jul. 31, 2015
Periodic Payment Amount	$ 9,437
Prior Liens	0
Face Amount of Mortgages	3,097,000
Carrying Amount of Mortgages	1,474,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | Oklahoma 1
Mortgage Loans on Real Estate
Interest Rate	8.42%
Final Maturity Date	Oct. 28, 2019
Periodic Payment Amount	$ 59,007
Prior Liens	0
Face Amount of Mortgages	11,610,000
Carrying Amount of Mortgages	8,719,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | Oregon 1 [Member]
Mortgage Loans on Real Estate
Interest Rate	7.10%
Final Maturity Date	May 01, 2016
Periodic Payment Amount	$ 1,357
Prior Liens	0
Face Amount of Mortgages	225,000
Carrying Amount of Mortgages	225,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | Pennsylvania 1 [Member]
Mortgage Loans on Real Estate
Interest Rate	7.10%
Final Maturity Date	Mar. 01, 2016
Periodic Payment Amount	$ 1,479
Prior Liens	0
Face Amount of Mortgages	250,000
Carrying Amount of Mortgages	250,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | Texas 1
Mortgage Loans on Real Estate
Interest Rate	8.00%
Final Maturity Date	Feb. 28, 2021
Periodic Payment Amount	$ 53,507
Prior Liens	0
Face Amount of Mortgages	7,875,000
Carrying Amount of Mortgages	7,875,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | 4 properties in United Kingdom
Mortgage Loans on Real Estate
Interest Rate	7.50%
Final Maturity Date	Nov. 30, 2019
Periodic Payment Amount	$ 85,135
Prior Liens	0
Face Amount of Mortgages	13,742,000
Carrying Amount of Mortgages	13,409,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | 49 properties in 7 states.
Mortgage Loans on Real Estate
Interest Rate	9.75%
Final Maturity Date	Feb. 28, 2017
Periodic Payment Amount	$ 2,589,041
Prior Liens	0
Face Amount of Mortgages	360,000,000
Carrying Amount of Mortgages	305,833,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Triple Net [Member] | 15 properties in 8 states
Mortgage Loans on Real Estate
Interest Rate	8.00%
Final Maturity Date	Nov. 30, 2017
Periodic Payment Amount	$ 440,877
Prior Liens	0
Face Amount of Mortgages	171,090,000
Carrying Amount of Mortgages	134,100,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
First mortgage loans [Member] | Outpatient Medical [Member] | California 1 [Member]
Mortgage Loans on Real Estate
Interest Rate	6.08%
Final Maturity Date	Dec. 22, 2017
Periodic Payment Amount	$ 309,681
Prior Liens	0
Face Amount of Mortgages	65,000,000
Carrying Amount of Mortgages	60,902,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Connecticut 1
Mortgage Loans on Real Estate
Interest Rate	8.11%
Final Maturity Date	Apr. 01, 2018
Periodic Payment Amount	$ 39,658
Prior Liens	16,009,000
Face Amount of Mortgages	5,961,000
Carrying Amount of Mortgages	5,961,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Texas 2
Mortgage Loans on Real Estate
Interest Rate	12.17%
Final Maturity Date	May 01, 2019
Periodic Payment Amount	$ 31,009
Prior Liens	11,489,000
Face Amount of Mortgages	3,100,000
Carrying Amount of Mortgages	3,100,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Florida 1
Mortgage Loans on Real Estate
Interest Rate	12.17%
Final Maturity Date	Jul. 01, 2018
Periodic Payment Amount	$ 27,008
Prior Liens	9,283,000
Face Amount of Mortgages	2,700,000
Carrying Amount of Mortgages	2,700,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Florida 2
Mortgage Loans on Real Estate
Interest Rate	12.17%
Final Maturity Date	Nov. 01, 2018
Periodic Payment Amount	$ 27,008
Prior Liens	11,654,000
Face Amount of Mortgages	2,700,000
Carrying Amount of Mortgages	2,700,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Indiana 1 [Member]
Mortgage Loans on Real Estate
Interest Rate	10.50%
Final Maturity Date	Apr. 01, 2019
Periodic Payment Amount	$ 25,264
Prior Liens	11,211,000
Face Amount of Mortgages	2,887,000
Carrying Amount of Mortgages	2,887,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Indiana 2 [Member]
Mortgage Loans on Real Estate
Interest Rate	10.50%
Final Maturity Date	Apr. 01, 2019
Periodic Payment Amount	$ 17,320
Prior Liens	8,202,000
Face Amount of Mortgages	1,979,000
Carrying Amount of Mortgages	1,979,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Kansas 1 [Member]
Mortgage Loans on Real Estate
Interest Rate	10.50%
Final Maturity Date	Sep. 19, 2019
Periodic Payment Amount	$ 15,403
Prior Liens	1,228,000
Face Amount of Mortgages	1,760,000
Carrying Amount of Mortgages	1,760,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | Texas 3
Mortgage Loans on Real Estate
Interest Rate	10.50%
Final Maturity Date	Nov. 01, 2019
Periodic Payment Amount	$ 17,123
Prior Liens	0
Face Amount of Mortgages	1,957,000
Carrying Amount of Mortgages	1,957,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0
SecondMortgageMember | Triple Net [Member] | 5 properties in 3 states
Mortgage Loans on Real Estate
Interest Rate	10.00%
Final Maturity Date	Dec. 30, 2018
Periodic Payment Amount	$ 212,329
Prior Liens	51,467,000
Face Amount of Mortgages	25,000,000
Carrying Amount of Mortgages	12,455,000
Principal Amount of Loans Subject to Delinquent Principal or Interest	$ 0