Share - Based Compensation Textuals (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 482
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years
Aggregate number of shares of common stock awarded under the 2015 Plan	2,500
Shares available for future grants	2,021
Compensation expense	$ 5,520	$ 4,067	$ 4,461
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 4,848	1,595	1,749
Stock Options and Stock Appreciation Rights [ Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 7 months
Weighted-average remaining contractual terms for SARs/stock options outstanding	7 years
Weighted-average remaining contractual terms for SARs/stock options exercisable	5 years 4 months
Weighted-average remaining contractual terms for SARs/stock options expected to vest	6 years 11 months
Aggregate intrinsic values of SARs and stock options outstanding	$ 20,456
Aggregate intrinsic values of SARs/stock options exercisable	12,051
Aggregate intrinsic values of SARs/stock options expected to vest	20,075
Aggregate intrinsic values of SARs/stock options exercised during period	8,396	2,422	1,601
Total fair value of shares vested	1,788	1,291	2,187
Compensation expense	$ 1,891	1,543	1,610
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months
Shares available for future grants	91
Compensation expense	$ 1,331	446	836
Share-based compensation arrangement by share-based payment award, award requisite service period	3 years
Restricted stock and Restricted Stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 11 months
Compensation expense	$ 2,298	$ 2,078	$ 2,015
Restricted stock and Restricted Stock units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	1 year
Restricted stock and Restricted Stock units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	1 year
Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years