Segments - EBITDA Calculation by Segment (Parenthetical) (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Segment Reporting Information [Line Items]
Depreciation and amortization expense related to discontinued operations	$ 614,000	$ 870,000
Interest expense related to discontinued operations	1,366,000	3,147,000
Global Investment Management [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense related to discontinued operations	400,000	500,000
Interest expense related to discontinued operations	500,000	1,000,000
EBITDA related to discontinued operations	800,000	1,400,000
Development Services [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense related to discontinued operations	200,000	400,000
Interest expense related to discontinued operations	900,000	2,200,000
EBITDA related to discontinued operations	2,200,000	6,000,000
Provision for income taxes related to discontinued operations	$ 400,000	$ 1,300,000