Subsequent Events (Details) (Subsequent event, USD $)	0 Months Ended
Apr. 22, 2014
Subsequent event
Subsequent Event [Line Items]
Additional authorized stock repurchase amount	$ 100,000,000

Amount of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration