CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 5,356	$ 7,593	$ 23,446	$ 16,926
Other comprehensive income:
Foreign currency translation adjustments	(74)	(1,487)	3,082	824
Change in fair value of interest rate swaps	36	56	108	109
Comprehensive income	$ 5,318	$ 6,162	$ 26,636	$ 17,859