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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
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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)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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