Share-based Compensation - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Expected forfeiture rate			4.80%
Closing stock price (in dollars per share)	$ 27.87		$ 27.87		$ 23.50
Proceeds from stock option exercises			$ 1,610,000	$ 1,267,000
Common Stock, Par or Stated Value Per Share	$ 1		$ 1		$ 1
Non-qualified Stock Options with Time-based Vesting (NQO) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Vested in period (shares)			43,225
Proceeds from stock option exercises			$ 1,300,000	$ 1,300,000
Weighted average award recognition period	2 years 3 months 18 days
Non-qualified Stock Options with Time-based Vesting (NQO) [Member] | 2007 Amended and Restated Long-term Incentive Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Options granted in period			18,589	13,123
Weighted average exercise price of options granted (in dollars per share)			$ 29.17	$ 23.44
Award vesting period			3 years
Unrecognized compensation cost	$ 400,000		$ 400,000		$ 400,000
Allocated share-based compensation expense	0	$ 100,000	$ 200,000	$ 300,000
Non-qualified Stock Options with Performance-based and Time-based Vesting (PNQ) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Weighted average award recognition period			1 year 7 months 6 days
Non-qualified Stock Options with Performance-based and Time-based Vesting (PNQ) [Member] | 2007 Amended and Restated Long-term Incentive Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Options granted in period			143,466
Weighted average exercise price of options granted (in dollars per share)			$ 29.48
Award vesting period			3 years
Unrecognized compensation cost	2,100,000		$ 2,100,000		$ 1,500,000
Allocated share-based compensation expense	$ 200,000	$ 100,000	$ 300,000	400,000
Award vesting rights, percent			33.30%
Percent of shares issuable under grant to be forfeited if modified net income does not meet FY2016 target			20.00%
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Award vesting period			3 years
Weighted average award recognition period	2 years 2 months 12 days
Allocated share-based compensation expense	$ 100,000		$ 100,000	200,000
Restricted stock granted			9,638
Restricted stock, granted, weighted average fair value (in dollars per share)			$ 29.91
Restricted stock vested in period			24,841
Shares withheld for tax purposes			5,177
Vested [Member] | Non-qualified Stock Options with Performance-based and Time-based Vesting (PNQ) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Proceeds from stock option exercises			$ 300,000	$ 0