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

Subsequent Events (Details) (USD $)	3 Months Ended	8 Months Ended	0 Months Ended
Subsequent Events (Details) (USD $)	Mar. 31, 2015	Jan. 04, 2015	Apr. 27, 2015
Subsequent Event [Line Items]
Authorized share amount for repurchase	$ 20,000,000	$ 10,000,000
Subsequent Event
Subsequent Event [Line Items]
Authorized share amount for repurchase			$ 30,000,000