Employee Benefit Plans Weighted average fair value of restricted stock plan issuances (Details) - $ / shares	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars)	$ 14.29	$ 11.89	$ 7.59
Performance-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars)	64.91	53.08	48.46
Time-Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars)	$ 73.83	$ 62.85	$ 51.62