Prior Period Adjustment Recorded in Current Period (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		36 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Error Corrections and Prior Period Adjustments [Line Items]
Net sales	$ 638,964		$ 503,014	$ 1,158,582	$ 946,336
Net income	$ 34,689		$ 31,242	$ 48,388	$ 52,105
Adjustment of net sales | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net sales						$ 9,259
Adjustment of net sales | Prior period adjustment
Error Corrections and Prior Period Adjustments [Line Items]
Net sales		$ (9,259)
Adjustment of net income | Previously reported
Error Corrections and Prior Period Adjustments [Line Items]
Net income						$ 5,926
Adjustment of net income | Prior period adjustment
Error Corrections and Prior Period Adjustments [Line Items]
Net income		$ (5,926)