Strategic Investments and Fair Value of Financial Instruments (Details) (Albemarle & Bond Holdings [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Albemarle & Bond Holdings [Member]
Summary of financial information for Albemarle & Bond
Current assets	$ 134,387	$ 121,519
Non-current assets	65,354	56,755
Total assets	199,741	178,274
Current liabilities	21,021	25,801
Non-current liabilities	62,169	53,497
Shareholders' equity	116,551	98,976
Total liabilities and shareholders' equity	199,741	178,274
Gross revenues	99,804	76,424
Gross profit	58,165	46,745
Profit for the year (net income)	$ 14,208	$ 12,088

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