Investments in Unconsolidated Real Estate Joint Ventures (Details Textual)			1 Months Ended					12 Months Ended
	Apr. 07, 2015	Apr. 02, 2014 USD ($) $ / shares shares	Dec. 18, 2015 USD ($)	Dec. 16, 2015 USD ($)	Nov. 20, 2015 USD ($)	May. 20, 2015	Jul. 29, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	May. 22, 2015 $ / shares	Jan. 20, 2015 $ / shares	Nov. 04, 2014	Oct. 08, 2014 $ / shares	Jul. 31, 2014	May. 23, 2014
Equity Method Investment And Joint Venture [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest		100.00%						100.00%
Number of Real Estate Properties, Fee Simple												306			29
Preferred ship Interest Return At Annual Rate								15.00%
Percentage Of Preferred ship Interest								70.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value								$ 17,300,000
Ground Lease Term								85 years
Debt Instrument, Description of Variable Rate Basis	base rate plus 1.25% or LIBOR plus 2.25%.					LIBOR plus 2.0%.
Proceeds from Construction Loans Payable				$ 38,100,000
Debt Instrument, Interest Rate Terms				one-month LIBOR plus 2.50%.
Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination Disposition Fee		$ 300,000
Sale of Stock, Price Per Share | $ / shares										$ 13.00	$ 12.50		$ 11.90
IPO [Member]
Equity Method Investment And Joint Venture [Line Items]
Sale of Stock, Price Per Share | $ / shares		$ 14.50
Bluerock Multifamily Advisor, LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination Disposition Fee Shares		19,343
Fund I [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment Capital Commitment Funded Amount							$ 5,600,000
BR Alexan [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple														340
Preferred ship Interest Return At Annual Rate									15.00%
Equity Method Investment Capital Commitment Funded Amount								$ 6,500,000
Stonehenge 23Hundred JV ,LLC [Member] | Prior To Restructuring [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment, Ownership Percentage								17.50%
23Hundred, LLC member
Equity Method Investment And Joint Venture [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest								100.00%
23Hundred@Berry Hill
Equity Method Investment And Joint Venture [Line Items]
Restructuring and Related Activities, Description								Following the restructuring, Berry Hill was owned in tenancy-in-common interests, adjusted for the promote interest, as follows: (i) BEMT Berry Hill and Fund III, through 23Hundred, LLC, hold a 42.2287% undivided tenant-in-common interest in Berry Hill (the Company, through BEMT Berry Hill, LLC, owns a 19.8% indirect equity interest and Fund III owns a 22.4% indirect equity interest); (ii) BGFs subsidiary, BGF 23Hundred, LLC, a Delaware limited liability company, holds a 22.9330% undivided tenant-in-common interest in Berry Hill; and (iii) Stonehenge 23Hundred JV Member LLCs subsidiary, SH 23Hundred TIC, LLC, a Delaware limited liability company, holds a 34.8383% undivided tenant-in-common interest in Berry Hill.
BRG Co-Owner [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment Capital Commitment Funded Amount								$ 17,700,000
BRG Whetstone Durham LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Bridge Loan								$ 25,200,000
BRG Whetstone Durham LLC [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple								204
BRG Cheshire LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value								$ 16,400,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage								100.00%
BRG Cheshire LLC [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple								285
BRG Oak Crest, LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest		93.432%
BR Oak Crest Villas, LLC, [Member]
Equity Method Investment And Joint Venture [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest		71.90%
Oak Crest Villas JV, LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest		100.00%
Number of Real Estate Properties, Fee Simple		209
Oak Crest Interest [Member]
Equity Method Investment And Joint Venture [Line Items]
Stock Issued During Period, Shares, Acquisitions | shares		200,143
Stock Issued During Period, Value, Acquisitions		$ 2,900,000
Fund II, Oak Crest Interest, in BR Oak Crest Villas, LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination Disposition Fee		$ 200,000
Fund II, Oak Crest Interest, in BR Oak Crest Villas, LLC [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination Disposition Fee Shares		15,474
Berry Hill [Member] | Prior To Restructuring [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment, Ownership Percentage								25.10%
Alexan CityCentre [Member]
Equity Method Investment And Joint Venture [Line Items]
Long-term Purchase Commitment, Amount									$ 6,500,000
Equity Method Investment, Ownership Percentage														100.00%
BGF [Member]
Equity Method Investment And Joint Venture [Line Items]
Long-term Purchase Commitment, Amount									$ 8,800,000
Equity Method Investment, Ownership Percentage									49.95%
BGF [Member] | Prior To Restructuring [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment, Ownership Percentage								29.00%
UCF or lando [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple							296
Preferred Return On Investment, Percentage							100.00%
Long-term Purchase Commitment, Amount							$ 3,600,000
Preferred ship Interest Return At Annual Rate							15.00%
Equity Method Investment Capital Commitment Funded Amount							$ 3,600,000
Percent Reduction In Outstanding Capital Contributions							20.00%
BRG Southside LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage								100.00%
BRG Southside LLC [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple								269
Bank of America [Member]
Equity Method Investment And Joint Venture [Line Items]
Debt Instrument, Description of Variable Rate Basis	1.25% or LIBOR plus 2.25%.
Fund II LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Long-term Purchase Commitment, Amount									$ 5,400,000
Equity Method Investment, Ownership Percentage									30.61%
Fund III LLC [Member]
Equity Method Investment And Joint Venture [Line Items]
Long-term Purchase Commitment, Amount									$ 3,400,000
Equity Method Investment, Ownership Percentage									19.44%
Fund III LLC [Member] | Prior To Restructuring [Member]
Equity Method Investment And Joint Venture [Line Items]
Equity Method Investment, Ownership Percentage								28.40%
Acquisition of Phase 1 Interest [Member]
Equity Method Investment And Joint Venture [Line Items]
Capital Commitment					$ 18,600,000
Percentage of Acquire Preferred Equity Interests					100.00%
Funded Amount					$ 3,800,000
Acquisition of Phase 1 Interest [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple								301
Acquisition of Flagler Village Interest [Member]
Equity Method Investment And Joint Venture [Line Items]
Capital Commitment			$ 46,800,000
Funded Amount			$ 5,500,000
Acquisition of Flagler Village Interest [Member] | Common Class A [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple								384
Acquisition of Lake Boone Trail [Member]
Equity Method Investment And Joint Venture [Line Items]
Number of Real Estate Properties, Fee Simple			245
Capital Commitment			$ 16,800,000
Percentage of Acquire Preferred Equity Interests			100.00%
Funded Amount			$ 9,900,000