Assets and Liabilities of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 71,367	$ 50,894	$ 47,569
Inventory	10,502	10,247
Other current assets	2,115	1,266
Total current assets of discontinued operations	687	3,614
Intangible assets, net	3,113	4,329
Goodwill	17,780	17,780
Other noncurrent assets	1,287	3,087
Assets of discontinued operations	1,268	4,264
Trade payables	3,586	2,222
Other current liabilities	1,326	1,009
Total current liabilities of discontinued operations	2,065	2,292
Liabilities of discontinued operations	8,815	9,792
Discontinued Operations
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash and cash equivalents	114	162
Inventory	433	516
FHLB stock, carrying amount		2,051
Real estate owned, net	95	830
Other current assets	45	55
Total current assets of discontinued operations	687	3,614
Intangible assets, net	149	196
Goodwill	400	400
Other noncurrent assets	32	54
Litigation reserve	1,852	1,775
Trade payables	189	361
Unclaimed property	19	153
Other current liabilities	5	3
Repurchase reserve	$ 6,750	$ 7,500