Commitments and Contingencies (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Commitments and Contingencies [Abstract]
Number of shares held by the shareholders who sent notices to Sealy purporting to exercise their appraisal rights in accordance with the Merger Agreement (in shares)	3.1
Cash per share price (in dollars per share)	$ 2.2
Site Contingency [Line Items]
Accrued expenses associated with remediation project	$ 2.9
Oakville, Connecticut [Member]
Site Contingency [Line Items]
Accrued expenses associated with remediation project	$ 1.1