Investments - Summary of Gross Unrealized Losses and Fair Values of Available-For-Sale Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	$ 1,776	$ 261
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(80)	(13)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	0	4,712
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	0	(288)
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	1,776	4,973
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(80)	(301)
Common stock - Domestic [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	125
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(3)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	0
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	125
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(3)
Common stock - International [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value		95
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses		(5)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses		0
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		95
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total		(5)
Corporate debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	1,382
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(74)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	0
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	1,382
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(74)
Mutual funds - Fixed income [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	151
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(2)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	0
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	151
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	(2)
Offshore fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value		0
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses		0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value		4,712
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses		(288)
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total		4,712
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total		(288)
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	118	166
Available-for-sale securities, Continuous Unrealized Loss Position, Less Than 12 Months, Gross Unrealized Losses	(1)	(8)
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Value	0	0
Available-for-sale securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	0	0
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value, Total	118	166
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	$ (1)	$ (8)