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Investments - Fair Value Measurements on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value [1] $ 15,640 $ 17,817
Total available-for-sale securities [2],[3] 4,263 6,196
Total Investments 19,903  
Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 15,640 17,817
Total available-for-sale securities 4,263 6,196
Total Investments 19,903 24,013
Offshore fund [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value [1] 481 998
Offshore fund [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 481 998
Mutual funds - Fixed income [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value [1] 14,754 16,333
Total available-for-sale securities [3] 1,214 1,247
Mutual funds - Fixed income [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 14,754 16,333
Total available-for-sale securities 1,214 1,247
Mutual funds - Domestic equity [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value [1] 405 459
Total available-for-sale securities [3] 463 550
Mutual funds - Domestic equity [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 405 459
Total available-for-sale securities 463 550
Common stock - Domestic [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities [3] 842 1,118
Common stock - Domestic [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 842 1,118
Common stock - International [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities [3] 965 1,409
Common stock - International [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 965 1,409
Corporate debt [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities [3] 616 1,632
Corporate debt [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 616 1,632
Other [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value [1] 0 27
Total available-for-sale securities [3] 163 240
Other [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 27
Total available-for-sale securities 163 240
Quoted Prices (Level 1) [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 15,159 16,819
Total available-for-sale securities 3,647 4,853
Total Investments 18,806 21,672
Quoted Prices (Level 1) [Member] | Offshore fund [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Quoted Prices (Level 1) [Member] | Mutual funds - Fixed income [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 14,754 16,333
Total available-for-sale securities 1,214 1,247
Quoted Prices (Level 1) [Member] | Mutual funds - Domestic equity [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 405 459
Total available-for-sale securities 463 550
Quoted Prices (Level 1) [Member] | Common stock - Domestic [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 842 1,118
Quoted Prices (Level 1) [Member] | Common stock - International [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 965 1,406
Quoted Prices (Level 1) [Member] | Corporate debt [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 0 292
Quoted Prices (Level 1) [Member] | Other [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 27
Total available-for-sale securities 163 240
Significant Other Inputs (Level 2) [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 481 998
Total available-for-sale securities 77 1,093
Total Investments 558 2,091
Significant Other Inputs (Level 2) [Member] | Offshore fund [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 481 998
Significant Other Inputs (Level 2) [Member] | Mutual funds - Fixed income [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 0 0
Significant Other Inputs (Level 2) [Member] | Mutual funds - Domestic equity [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 0 0
Significant Other Inputs (Level 2) [Member] | Common stock - Domestic [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 0 0
Significant Other Inputs (Level 2) [Member] | Common stock - International [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 0 3
Significant Other Inputs (Level 2) [Member] | Corporate debt [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 77 1,090
Significant Other Inputs (Level 2) [Member] | Other [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 0 0
Significant Unobservable Inputs (Level 3) [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 539 250
Total Investments 539 250
Significant Unobservable Inputs (Level 3) [Member] | Offshore fund [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Significant Unobservable Inputs (Level 3) [Member] | Mutual funds - Fixed income [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 0 0
Significant Unobservable Inputs (Level 3) [Member] | Mutual funds - Domestic equity [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities 0 0
Significant Unobservable Inputs (Level 3) [Member] | Common stock - Domestic [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 0 0
Significant Unobservable Inputs (Level 3) [Member] | Common stock - International [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 0 0
Significant Unobservable Inputs (Level 3) [Member] | Corporate debt [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total available-for-sale securities 539 250
Significant Unobservable Inputs (Level 3) [Member] | Other [Member] | Recurring basis [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities, at fair value 0 0
Total available-for-sale securities $ 0 $ 0
[1] Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.
[2] Net unrealized gains (losses) on available-for-sale securities gross and net of tax as of June 30, 2015, are $(339) and $(339), respectively, and as of June 30, 2014, are $1,345 and $888, respectively.
[3] Unrealized gains and losses on available-for-sale securities are excluded from earnings and recorded in other comprehensive income (loss) as a separate component of shareholders’ equity until realized.