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EARNINGS PER SHARE (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings attributable to common shareholders [Abstract]        
From continuing operations $ 6,432 $ 5,079 $ 10,660 $ 8,930
From discontinued operations 0 (165) 0 (295)
Net income attributable to common shareholders 6,432 4,914 10,660 8,635
Revaluation of redeemable non-controlling interests, net of tax (119) 0 (1,086) 0
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest, Total $ 6,313 $ 4,914 $ 9,574 $ 8,635
Basic earnings per share attributable to common shareholders [Abstract]        
From continuing operations (in dollars per share) $ 0.53 $ 0.42 $ 0.88 $ 0.74
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax (in dollars per share) $ (0.01) $ 0 $ (0.09) $ 0
From discontinued operations (in dollars per share) $ 0 $ (0.01) $ 0 $ (0.02)
Basic (in dollars per share) $ 0.52 $ 0.41 $ 0.79 $ 0.72
Diluted earnings per share attributable to common shareholders [Abstract]        
From continuing operations (in dollars per share) $ 0.53 $ 0.42 $ 0.87 $ 0.74
Charges to additional-paid-in-capital - revaluation of redeemable non-controlling interests, net of tax (in dollars per share) $ (0.01) $ 0 $ (0.09) $ 0
From discontinued operations (in dollars per share) $ 0 $ (0.01) $ 0 $ (0.02)
Diluted (in dollars per share) $ 0.52 $ 0.41 $ 0.78 $ 0.72
Shares used in computation [Abstract]        
Basic earnings per share - weighted-average shares (in shares) 12,224 12,089 12,177 12,022
Effect of dilutive securities - stock options (in shares) 2 21 7 22
Denominator for diluted earnings per share - adjusted weighted-average shares (in shares) 12,226 12,110 12,184 12,044