Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Earnings Per Share [Abstract]
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
Denominator:
Basic weighted average shares outstanding (shares)									103,848	103,611	103,135
Effect of dilutive stock options, unvested restricted stock and unvested restricted share units (shares)									629	637	1,048
Diluted weighted average shares outstanding (shares)									104,477	104,248	104,183
Basic 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 income (loss) 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 income (loss) per common share:
Diluted net 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 income (loss) 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