Stockholders' Equity (Common Stock of Vanguard and Corporate Reorganization) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2013	Jun. 30, 2011 Restricted stock [Member]	Jun. 30, 2004 Blackstone [Member]
Class of Stock [Line Items]
Direct investment amount				$ 125.0
Issuance of common stock, shares	1,720,379
Granted, shares			1,684,733
Options granted, shares	1,245,086	284,177