Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended	1 Months Ended		3 Months Ended
	Mar. 31, 2014	Feb. 24, 2014 RTI Connecticut	Feb. 28, 2014 RTI Connecticut	Apr. 30, 2013 RTI Pierce Spafford	Mar. 31, 2014 RTI Pierce Spafford
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash receipts from disposal of subsidiary	$ 3,281,000	$ 3,300,000	$ 3,300,000	$ 12,400,000
Cash receipts from disposal of subsidiary net of escrow					$ 10,500,000