Debt - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Debt Instrument [Line Items]
Short-term borrowings outstanding	$ 21,632,000		$ 21,632,000		$ 4,930,000
Lines of credit	63,300,000		63,300,000		55,700,000
Outstanding Borrowings	0		0		0
Current portion of long-term debt	30,000,000		30,000,000		30,000,000
Long-term debt non current	240,038,000		240,038,000		255,043,000
Interest expense, net	1,855,000	3,687,000	3,825,000	9,682,000
Interest expense, gross	2,600,000	4,300,000	4,900,000	11,000,000
Non-cash interest expense	500,000	2,500,000	1,100,000	7,400,000
Cash interest expense, net	2,100,000	1,800,000	3,800,000	3,600,000
Interest income	700,000	600,000	1,100,000	1,300,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Amount of outstanding letters of credit	6,000,000		6,000,000		6,800,000
Current portion of long-term debt	30,000,000		30,000,000		30,000,000
Long-term debt non current	240,000,000		240,000,000		255,000,000
Unused available credit	744,000,000		744,000,000		743,200,000
Term Facility [Member]
Debt Instrument [Line Items]
Outstanding Borrowings	$ 270,000,000		$ 270,000,000		$ 285,000,000