Shareholder Rights Plan (Details) (USD $)			0 Months Ended
	Aug. 02, 2013	Aug. 03, 2012	Apr. 09, 2012 April 9, 2012 Shareholder Rights Plan [Member]	Apr. 09, 2012 April 9, 2012 Shareholder Rights Plan [Member] Series A Junior Participating Preferred Stock [Member]
Shareholder Rights Plan [Line Items]
Dividend declaration date			Apr. 09, 2012
Number of preferred share purchase right declared as dividend for each share of common stock outstanding			1
Dividend record date			Apr. 20, 2012
Dividend payment date			Apr. 20, 2012
Rights expiration date			Apr. 09, 2015
Par value of common share outstanding (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Exercise price of each right (in dollars per right)			$ 200
Common share equivalent for each preferred share portion (in shares)				1
Minimum number of days before rights can be exercised (in days)			10 days
Minimum percentage of outstanding common stock ownership required to qualify for an "Acquiring Person" (in hundredths)			20.00%
Quarterly dividends payments per share (in dollars per share)				$ 0.01
Amount entitled to receive per share upon liquidation of preferred share (in dollars per share)				$ 1
Redemption price of the right (in dollars per right)			$ 0.01
Minimum offering period (in business days)			60 days
Subsequent offering period (in business days)			20 days
Minimum percentage of an ownership of common stock by an Acquiring Person before board of directors may extinguish right (in hundredths)			50.00%
Number of common stock shares that can be exchanged for each right if rights were extinguished (in shares)			1