Discontinued Operations - Changes in Future Remaining Lease Obligations Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance, Beginning of Period	$ 39,948	$ 43,644	$ 42,277	$ 45,961
Charges Incurred	1,148	444	846	739
Net Cash Payments	(3,396)	(2,876)	(5,412)	(5,488)
Other	(40)		(51)
Balance, End of Period	$ 37,660	$ 41,212	$ 37,660	$ 41,212