Total Gains (Losses) on Assets and Liabilities Measured on Fair Values on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013 Real estate owned, net	Mar. 31, 2014 Discontinued Operations Inventory
Fair Value Measurements Nonrecurring [Line Items]
Fair value of assets and liabilities, gains (losses)	$ (283)	$ 432

Gain or loss on assets and liabilities measured at fair value on a nonrecurring basis.

No definition available.

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Namespace Prefix:	sggh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration