Quarterly Financial Data (Unaudited) (Schedule of Quarterly Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 619,598	$ 632,720	$ 616,232	$ 589,219	$ 602,891	$ 588,798	$ 587,021	$ 564,795	$ 2,457,769	$ 2,343,505	$ 2,392,864
Gross profit	125,097	133,013	133,950	123,388	143,862	139,203	130,011	106,320	515,448	519,396	565,462
Operating income (loss)	16,580	29,254	30,965	29,241	7,174	49,621	37,859	14,769	106,040	109,423	118,801
Income before income taxes and equity in earnings of equity-method investees	5,838	24,032	25,246	26,086	1,366	42,150	34,116	10,246	81,202	87,878	87,069
Net income from continuing operations	(4,556)	25,241	43,130	18,613	(1,504)	32,824	24,769	9,452	82,428	65,541	27,571
Net (loss) income from discontinued operations, net of tax	(65,385)	(12,555)	3,973	1,233	1,817	(1,496)	2,417	(849)	(72,734)	1,889	19,858
Net income	$ (69,941)	$ 12,686	$ 47,103	$ 19,846	$ 313	$ 31,328	$ 27,185	$ 8,604	$ 9,694	$ 67,430	$ 47,429
Net income (loss) per common share:
Basic net income per common share from continuing operations (USD per share)	$ (0.04)	$ 0.24	$ 0.42	$ 0.18	$ (0.01)	$ 0.32	$ 0.24	$ 0.09	$ 0.79	$ 0.63	$ 0.27
Basic net (loss) income per common share from discontinued operations (USD per share)	(0.63)	(0.12)	0.04	0.01	0.02	(0.01)	0.02	(0.01)	(0.70)	0.02	0.19
Basic net income per common share (USD per share)	(0.67)	0.12	0.45	0.19	0.00	0.30	0.26	0.08	0.09	0.65	0.46
Diluted net (loss) income per common share from continuing operations (USD per share)	(0.04)	0.24	0.41	0.18	(0.01)	0.31	0.24	0.09	0.79	0.63	0.26
Diluted net (loss) income per common share from discontinued operations (USD per share)	(0.63)	(0.12)	0.04	0.01	0.02	(0.01)	0.02	(0.01)	(0.70)	0.02	0.19
Diluted net income per common share (USD per share)	$ (0.67)	$ 0.12	$ 0.45	$ 0.19	$ 0.00	$ 0.30	$ 0.26	$ 0.08	$ 0.09	$ 0.65	$ 0.46