Stock Repurchase Program And Shares Withheld From Vested Restricted Shares - Narrative (Details) (USD $)	0 Months Ended
Nov. 30, 2011	Aug. 21, 2013 Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount	$ 50,000,000
Share repurchase program, additional amount authorized		$ 50,000,000

The amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration