The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Stockholders' Equity - Share Repurchase Program (Details) - shares	Sep. 30, 2016	Apr. 30, 2016	Oct. 31, 2015	Apr. 30, 2013	Sep. 30, 2004	Mar. 31, 1999
Share Repurchase Program
Number of repurchased shares authorized		1,000,000	500,000	1,000,000	1,000,000	2,000,000
Number of available shares may be repurchased	1,020,763