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Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 3 Months Ended 0 Months Ended 46 Months Ended 105 Months Ended 3 Months Ended 89 Months Ended 3 Months Ended
Jul. 02, 2013
Mar. 31, 2014
Mar. 31, 2013
May 01, 2014
Nov. 06, 2013
Regular Semi-Annual Dividend
May 21, 2013
Regular Semi-Annual Dividend
May 02, 2014
Regular Semi-Annual Dividend
Subsequent Event [Member]
May 17, 2010
2010 Stock Repurchase Program
Mar. 31, 2014
2010 Stock Repurchase Program
Mar. 31, 2014
2005 401(k) Stock Repurchase Program
Mar. 31, 2014
2006 Director and Officer Repurchase Program
Mar. 31, 2013
2006 Director and Officer Repurchase Program
Mar. 31, 2014
2006 Director and Officer Repurchase Program
Mar. 31, 2014
Treasury Stock [Member]
2005 401(k) Stock Repurchase Program
Mar. 31, 2013
Treasury Stock [Member]
2005 401(k) Stock Repurchase Program
Schedule of Shareholders' Equity [Line Items]                              
Entity Common Stock, Shares Outstanding       36,619,360                      
Stock repurchase program authorized percentage               5.00%              
Stock repurchase program amount authorized (in shares)               2,000,000              
Stock repurchased during period (in shares)                 1,100,000 3,100,000 30,000 0 1,200,000 100,000 100,000
Aggregate price of shares repurchased since inception                 $ 11.5 $ 33.2     $ 13.2    
Average price of shares repurchased since inception (per share)                 $ 10.69 $ 10.55     $ 11.22    
Dividends declared (per share)   $ 0 $ 0   $ 0.10 $ 0.10 $ 0.13                
Stock split, conversion ratio 1.5