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Consolidated Statements of Changes in Equity (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings, Unappropriated [Member]
Parent [Member]
Noncontrolling Interest [Member]
Balance at Dec. 31, 2010 $ 406,976 $ 106,153 $ 100,291 $ 0 $ 1,204 $ 198,230 $ 405,878 $ 1,098
Balance (in shares) at Dec. 31, 2010   353,843   0        
Shares acquisition (4,627) 0 0 (4,627) 0 0 (4,627) 0
Shares acquisition (in shares)   0   (7,534)        
Shares retirement 0 (34) (91) 125 0 0 0 0
Shares retirement (in shares)   (114)   114        
Restricted stock vested 0 891 (891) 0 0 0 0 0
Restricted stock vested (in shares)   2,971   0        
Share-based compensation expenses 4,190 0 4,124 0 0 0 4,124 66
New shares issued by subsidiary 53 0 0 0 0 0 0 53
Sale (purchase) of subsidiary shares to (from) noncontrolling interests 1,283 0 (382) 0 0 0 (382) 1,665
Declaration of cash dividends (21,224) 0 0 0 0 (21,224) (21,224) 0
Comprehensive Income:                
Net income (loss) 9,507 0 0 0 0 10,706 10,706 (1,199)
Other comprehensive income (loss) (1,100) 0 0 0 (1,038) 0 (1,038) (62)
Balance at Dec. 31, 2011 395,058 107,010 103,051 (4,502) 166 187,712 393,437 1,621
Balance (in shares) at Dec. 31, 2011   356,700   (7,420)        
Shares acquisition (8,886) 0 0 (8,886) 0 0 (8,886) 0
Shares acquisition (in shares)   0   (11,443)        
Restricted stock vested 0 0 (919) 919 0 0 0 0
Restricted stock vested (in shares)   0   1,313        
Share-based compensation expenses 1,936 0 1,936 0 0 0 1,936 0
New shares issued by subsidiary 365 0 342 0 0 0 342 23
Sale (purchase) of subsidiary shares to (from) noncontrolling interests 533 0 501 0 0 0 501 32
Declaration of cash dividends (10,680) 0 0 0 0 (10,680) (10,680) 0
Comprehensive Income:                
Net income (loss) 50,138 0 0 0 0 51,596 51,596 (1,458)
Other comprehensive income (loss) (306) 0 0 0 (303) 0 (303) (3)
Balance at Dec. 31, 2012 428,158 107,010 104,911 (12,469) (137) 228,628 427,943 215
Balance (in shares) at Dec. 31, 2012   356,700   (17,550)        
Restricted stock vested 0 0 (1,349) 1,349 0 0 0 0
Restricted stock vested (in shares)   0   1,900        
Share-based compensation expenses 1,840 0 1,838 0 0 0 1,838 2
Excess tax benefits from restricted stock vested 1,271 0 1,271 0 0 0 1,271 0
New shares issued by subsidiary 6,245 0 2,426 0 0 0 2,426 3,819
Sale (purchase) of subsidiary shares to (from) noncontrolling interests (2,241) 0 (2,461) 0 0 0 (2,461) 220
Declaration of cash dividends (42,394) 0 0 0 0 (42,394) (42,394) 0
Comprehensive Income:                
Net income (loss) 55,924 0 0 0 0 61,476 61,476 (5,552)
Other comprehensive income (loss) (244) 0 0 0 (275) 0 (275) 31
Balance at Dec. 31, 2013 $ 448,559 $ 107,010 $ 106,636 $ (11,120) $ (412) $ 247,710 $ 449,824 $ (1,265)
Balance (in shares) at Dec. 31, 2013   356,700   (15,650)