CONDENSED BALANCE SHEETS [Parenthetical] (USD $)	Sep. 30, 2011	Mar. 31, 2011
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	83,651,080	83,651,080
Units of limited partnership interest, outstanding	83,649,080	83,649,080
Series Twenty
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,866,700	3,866,700
Units of limited partnership interest, outstanding	3,866,700	3,866,700
Series Twenty One
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	1,892,700	1,892,700
Units of limited partnership interest, outstanding	1,890,700	1,890,700
Series Twenty Two
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,564,400	2,564,400
Units of limited partnership interest, outstanding	2,564,400	2,564,400
Series Twenty Three
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,336,727	3,336,727
Units of limited partnership interest, outstanding	3,336,727	3,336,727
Series Twenty Four
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,169,878	2,169,878
Units of limited partnership interest, outstanding	2,169,878	2,169,878
Series Twenty Five
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,026,109	3,026,109
Units of limited partnership interest, outstanding	3,026,109	3,026,109
Series Twenty Six
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,995,900	3,995,900
Units of limited partnership interest, outstanding	3,995,900	3,995,900
Series Twenty Seven
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,460,700	2,460,700
Units of limited partnership interest, outstanding	2,460,700	2,460,700
Series Twenty Eight
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	4,000,738	4,000,738
Units of limited partnership interest, outstanding	4,000,738	4,000,738
Series Twenty Nine
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,991,800	3,991,800
Units of limited partnership interest, outstanding	3,991,800	3,991,800
Series Thirty
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,651,000	2,651,000
Units of limited partnership interest, outstanding	2,651,000	2,651,000
Series Thirty One
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	4,417,857	4,417,857
Units of limited partnership interest, outstanding	4,417,857	4,417,857
Series Thirty Two
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	4,754,198	4,754,198
Units of limited partnership interest, outstanding	4,754,198	4,754,198
Series Thirty Three
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,636,533	2,636,533
Units of limited partnership interest, outstanding	2,636,533	2,636,533
Series Thirty Four
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,529,319	3,529,319
Units of limited partnership interest, outstanding	3,529,319	3,529,319
Series Thirty Five
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,300,463	3,300,463
Units of limited partnership interest, outstanding	3,300,463	3,300,463
Series Thirty Six
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,106,837	2,106,837
Units of limited partnership interest, outstanding	2,106,837	2,106,837
Series Thirty Seven
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,512,500	2,512,500
Units of limited partnership interest, outstanding	2,512,500	2,512,500
Series Thirty Eight
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,543,100	2,543,100
Units of limited partnership interest, outstanding	2,543,100	2,543,100
Series Thirty Nine
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,292,152	2,292,152
Units of limited partnership interest, outstanding	2,292,152	2,292,152
Series Forty
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,630,256	2,630,256
Units of limited partnership interest, outstanding	2,630,256	2,630,256
Series Forty One
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,891,626	2,891,626
Units of limited partnership interest, outstanding	2,891,626	2,891,626
Series Forty Two
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,744,262	2,744,262
Units of limited partnership interest, outstanding	2,744,262	2,744,262
Series Forty Three
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	3,637,987	3,637,987
Units of limited partnership interest, outstanding	3,637,987	3,637,987
Series Forty Four
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,701,973	2,701,973
Units of limited partnership interest, outstanding	2,701,973	2,701,973
Series Forty Five
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	4,014,367	4,014,367
Units of limited partnership interest, outstanding	4,014,367	4,014,367
Series Forty Six
Beneficial assignee certificate, par value (in dollars per share)	$ 10	$ 10
Units of limited partnership interest, authorized	101,500,000	101,500,000
Units of limited partnership interest, issued	2,980,998	2,980,998
Units of limited partnership interest, outstanding	2,980,998	2,980,998