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Condensed Consolidated Statements Of Stockholders' Equity (USD $)
In Thousands, unless otherwise specified
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Earnings [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Total
Balance at Dec. 31, 2011 $ 245 $ 123,406 $ 249,852 $ (1,968) $ 371,535
Balance, shares at Dec. 31, 2011 24,520        
Net income     11,406   11,406
Other comprehensive income:          
Unrealized gain on derivative instruments, net of tax       682 682
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes 2 (2,018)     (2,016)
Exercise of stock options and issuance of share-based awards, net of shares withheld for employee taxes, shares 176        
Stock-based compensation   2,266     2,266
Tax benefit related to stock-based compensation   984     984
Balance at Mar. 31, 2012 $ 247 $ 124,638 $ 261,258 $ (1,286) $ 384,857
Balance, shares at Mar. 31, 2012 24,696