Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended			1 Months Ended
	Dec. 31, 2012 Senior Unsecured Credit Facilities	Dec. 31, 2012 Senior Unsecured Credit Facilities Maximum	Dec. 31, 2012 Senior Unsecured Credit Facilities Minimum	Oct. 12, 2012 Senior Unsecured Credit Facilities KeyBank National Association	Dec. 31, 2012 Senior Unsecured Credit Facilities Acquisition Covenants Maximum	Dec. 31, 2012 Senior Unsecured Credit Facilities Acquisition Covenants Minimum	Oct. 12, 2012 Senior Secured Credit Facility Loan and Security Agreement with Silicon Valley Bank
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 200,000			$ 35,000
Debt instrument borrowing period				5 years
Credit Agreement accordion feature, incremental revolver or term loan amount	50,000
Leverage Ratio		3.50			3.25
Interest Coverage Ratio			3.0			3.0
Remaining borrowing capacity	77,000
Borrowings outstanding	0
Amount of outstanding letter of credit	$ 3,000