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Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net income attributable to common shareholders $ 66,117 $ 54,307 $ 46,397
Foreign currency translation gain (loss) 751 (1,037) (1,000)
Net unrealized gain (loss) from available-for-sale securities, net of tax 3,052 (1,783) 416
Reclassification to statements of operations of (gain) loss from available-for-sale securities, net of tax (1,237) (376) (7,564)
Total comprehensive income attributable to common shareholders $ 68,683 $ 51,111 $ 38,249