Share-Based Compensation - Summary of Nonvested Stock Awards Activity (Details) - Restricted stock unit awards - 1993 Plan - $ / shares	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Number of Awards
Balance at the beginning of the period (in shares)	127,409	113,563	215,415
Time-based granted (in shares)	130,742	97,168	14,086
Performance-based granted (in shares)	49,529	895	20,794
Vested (in shares)	(36,057)	(76,214)	(120,117)
Forfeited (in shares)	(83,154)	(8,003)	(16,615)
Balance at the end of the period (in shares)	188,469	127,409	113,563
Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 45.09	$ 44.99	$ 43.75
Time-based granted (in dollars per share)	35.96	42.65	52.58
Performance-based granted (in dollars per share)	31.11	54.37	48.85
Vested (in dollars per share)	48.85	42.04	43.96
Forfeited (in dollars per share)	42.14	48.94	48.02
Balance at the end of the period (in dollars per share)	$ 35.69	$ 45.09	$ 44.99