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Supplemental Cash Flow Disclosures (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Supplemental Cash Flow Information [Abstract]        
Cash paid during the period for interest $ 7,296 $ 2,216 $ 11,017 $ 6,523
Cash received during the period for interest 519 376 961 915
Cash paid during the period for income taxes $ 6,401 $ 14,156 $ 15,058 $ 19,047