Stock Incentive Plans (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	May 03, 2012	Sep. 07, 2012 Stock Options [Member]	Sep. 07, 2012 Restricted Stock [Member] M	Sep. 09, 2011 Restricted Stock [Member]	Sep. 07, 2012 Restricted Stock [Member]	Sep. 09, 2011 Restricted Stock [Member]	Sep. 07, 2012 Restricted Stock Units (RSUs) [Member]	Sep. 09, 2011 Restricted Stock Units (RSUs) [Member]	Sep. 07, 2012 Restricted Stock Units (RSUs) [Member] D M	Sep. 09, 2011 Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of shares, Beginning Balance					1,010,127				161,575
Weighted-average grant date fair value, Beginning balance (in dollars per share)					$ 6.97				$ 11.45
Number of shares, Granted					365,599				89,990
Weighted-average grant date fair value, Granted (in dollars per share)					$ 9.84				$ 11.14
Number of shares, Additional units from dividends									5,249
Weighted-average grant date fair value, Additional units from dividends (in dollars per share)									$ 10.07
Number of shares, Additional shares from dividends					7,541
Weighted-average grant date fair value, Additional shares from dividends (in dollars per share)					$ 10.07
Number of shares, Foreited					(1,004)
Weighted-average grant date fair value, Forfeited			$ 10.06		$ 10.06
Number of shares, Vested					(690,718)
Weighted-average grant date fair value, Vested (in dollars per share)					$ 5.36
Number of shares, Ending Balance			691,545		691,545		256,814		256,814
Weighted-average grant date fair value, Ending balance (in dollars per share)			$ 10.09		$ 10.09		$ 11.32		$ 11.32
Restricted Stock Awards Expected to Vest One Year from Balance Sheet (in shares)			5,841		5,841
Restricted Stock Awards Expected to Vest Two Years from Balance Sheet Date (in shares)			343,154		343,154
Restricted Stock Awards Expected to Vest Three Years from Balance Sheet Date (in shares)			220,851		220,851
Restricted Stock Awards Expected to Vest Four Years from Balance Sheet Date (in shares)			121,699		121,699
Summary of Stock Appreciation Rights and Dividend Equivalent Rights
Share based payment, vesting period (in years)					3 years				3 years
Stock Incentive Plans (Textuals) [Abstract]
Stock option and Incentive plan, shares authorized		8,000,000
Number of Shares Issued or Committed to Issue		3,239,577
Shares Issued in Period	12,104
Deferred Compensation Arrangement with Individual, Shares Issued	18,156
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued	$ 325,000
Unrecognized compensation cost (in dollars)			5,000,000		5,000,000		1,400,000		1,400,000
Unrecognized compensation expense related to compensation awards, period for recognition (in months)			24						24
Compensation expense (in dollars)			$ 800,000	$ 900,000	$ 2,300,000	$ 2,600,000	$ 200,000	$ 100,000	$ 600,000	$ 400,000
Number of Trading Days of Average Closing Price of Common Stock on Vesting Date used to Calculate Total Shareholder Return (in days)									30
Number Of Trading Days Of Average Closing Price Of Common Stock On Grant Date Used To Calculate Total Stockholder Return (in days)									30
Maximum Possible Payout to Executive Officer as a Percentage of the Target Award (as a percent)									150.00%
Threshold Percentage Of No Payout If Stockholder Return Is Less Then Target Return (as a percent)									50.00%