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Stock Based Compensation Plans (Narrative) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted to employees         217
Total unrecognized compensation cost related to option awards $ 408   $ 408    
Restricted Stock [Member] | Employees [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock granted, vesting period     3 years   3 years
Common stock granted, shares     120   103
Restricted Stock [Member] | Non Employee Directors [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock granted, vesting period     1 year   1 year
Common stock granted, shares     25   38
Performance Shares [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock granted, shares     84   49
Upper limit of target grant, shares     126   73
Performance-vested restricted stock units, vesting percentage 100.00%   100.00%   100.00%
Stock Option [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock granted, vesting period         3 years
Stock options granted to employees, term in years         10 years
Stock-based compensation expense 80 98 163 171  
Restricted Stock and Restricted Stock Units [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense 378 216 736 420  
Total unrecognized compensation cost $ 2,565   $ 2,565    
2010 Plan [Member]
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares of common stock that may be issued 5,250   5,250