Prior Period Adjustment Recorded in Current Period (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Error Corrections and Prior Period Adjustments [Line Items]
Net sales	$ 524,270	$ 532,721	$ 638,964	$ 519,618	$ 573,594	$ 471,225	$ 503,014	$ 443,322	$ 2,215,573	$ 1,991,155	$ 1,467,202
Net income	$ 6,971	$ 16,662	$ 34,689	13,699	$ 26,702	$ 23,056	$ 31,242	$ 20,863	$ 72,021	$ 101,863	$ 54,157
Adjustment of net sales
Error Corrections and Prior Period Adjustments [Line Items]
Net sales				(9,259)
Adjustment of net sales | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net sales				9,259
Adjustment of net income
Error Corrections and Prior Period Adjustments [Line Items]
Net income				(5,926)
Adjustment of net income | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net income				$ 5,926