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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings per share attributable to common shareholders [Abstract]        
From operations prior to revaluation of redeemable non-controlling interests, net of tax $ 5,713 $ 5,818 $ 18,112 $ 16,288
Charges to additional paid-in-capital - revaluation of redeemable non-controlling interests, net of tax 0 0 0 (376)
Net income attributable to common shareholders $ 5,713 $ 5,818 $ 18,112 $ 15,912
Basic and diluted earnings per share attributable to common shareholders [Abstract]        
From operations prior to revaluation of redeemable non-controlling interests, net of tax (in dollars per share) $ 0.46 $ 0.47 $ 1.45 $ 1.32
Charges to additional paid-in-capital - revaluation of redeemable non-controlling interests, net of tax (in dollars per share) 0 0 0 (0.03)
Basic and diluted earnings per share attributable to common shareholders (in dollars per share) $ 0.46 $ 0.47 $ 1.45 $ 1.29
Shares used in computation [Abstract]        
Basic and diluted earnings per share - weighted-average shares (in shares) 12,520 12,421 12,494 12,382