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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Current:                      
Federal                 $ 154 $ 3,935 $ 3,540
State                 1,358 1,267 1,629
Foreign                 73 170  
Total current                 1,585 5,372 5,169
Deferred:                      
Federal                 8,891 5,539 7,610
State                 1,219 431 470
Foreign                 187    
Total deferred                 10,297 5,970 8,080
Total income tax expense $ 571 $ 4,638 $ 2,976 $ 3,697 $ (2,968) $ 5,260 $ 6,119 $ 2,931 $ 11,882 $ 11,342 $ 13,249
Reconciliation to income tax at the statutory rate:                      
U.S. federal tax at statutory rates (as a percent)                 35.00% 35.00% 35.00%
Permanent items (as a percent)                 1.40% 1.60% 0.20%
Lobbying (as a percent)                 2.40% 3.60% 3.10%
State taxes, net of federal benefit (as a percent)                 6.60% 4.40% 4.00%
Transaction costs (as a percent)                   5.90%  
Research and development tax credits (as a percent)                 (1.00%) (2.50%) (4.30%)
Effects of foreign operations                 (2.70%) (0.80%) 0.20%
Noncontrolling interests                 1.80% 1.70% 0.70%
Other (as a percent)                 (1.10%) 0.40% (0.10%)
Provision for income taxes (as a percent)                 42.40% 49.30% 38.80%