Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net proceeds from sale of discontinued operations			$ 58,027,000
Total net tax gain from disposal of discontinued operation			29,600,000
Net income tax gain from disposal of discontinued operation	27,600,000		27,637,000
Tax effect from gain on disposal of discontinued operation			1,900,000
CTA reclassification adjustment realized upon sale			12,693,000
Statutory income tax rate		35.00%	35.00%
Taiwan Land
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Promissory note receivable	$ 3,000,000	$ 3,000,000	$ 3,000,000