v2.4.0.6
NET INCOME PER COMMON SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Impact Of Equity Awards [Line Items]                      
Price range of option: from                 $ 6.43 $ 8.21 $ 9.63
Price range of option: to                 $ 48.21 $ 48.21 $ 48.21
Earnings Per Share, Basic and Diluted [Abstract]                      
Net Income (Loss) Attributable to Parent $ 7,347 $ 8,177 $ (3,207) $ (1,049) $ 10,524 $ 8,231 $ 46,501 $ 1,021 $ 11,268 $ 66,277 $ 46,436
Weighted Average Number Of Shares Outstanding Basic 36,935,000 36,735,000 36,686,000 36,483,000 36,380,000 36,367,000 36,353,000 36,053,000 36,906,468 36,369,410 35,712,026
Earnings Per Share Basic                 $ 0.31 $ 1.82 $ 1.30
Incremental Common Shares Attributable to Share-based Payment Arrangements                 903,178 1,394,555 1,967,360
Weighted Average Number Of Diluted Shares Outstanding 37,837,000 37,548,000 36,686,000 36,483,000 37,473,000 37,463,000 37,742,000 37,865,000 37,809,646 37,763,965 37,679,386
Earnings Per Share Diluted                 $ 0.30 $ 1.76 $ 1.23
Options Activity [Member]
                      
Impact Of Equity Awards [Line Items]                      
Excluded shares as anti-dilutive when reporting loss                 46,000 54,000 66,000
Restricted Stock Units Activity [Member]
                      
Impact Of Equity Awards [Line Items]                      
Excluded shares as anti-dilutive under the treasury stock method                 1,139,000 1,145,000 243,000
Restricted Stock Units Activity [Member] | Restricted Stock Units Service Conditions [Member]
                      
Impact Of Equity Awards [Line Items]                      
Excluded shares as anti-dilutive when reporting loss                 939,000 945,000 43,000
Restricted Stock Units Activity [Member] | Restricted Stock Units Service And Market Conditions But Market Not Met [Member]
                      
Impact Of Equity Awards [Line Items]                      
Excluded shares as anti-dilutive when reporting loss                 200,000 200,000 200,000