Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Tax effect on the derecognition of equity component of 5.0% convertible notes   $ 662 $ 627
Tax effect on fair value of interest rate swap agreements 6,514 1,035 1,527
Tax benefit associated with change in pension actuarial loss 460 98 193
Dividends per share $ 0.10 $ 0.10 $ 0.10
Stated interest rate on debt agreement   5.00% 5.00%
Convertible senior notes due   2029 2029
Paid-In Capital [Member]
     
Tax effect on the derecognition of equity component of 5.0% convertible notes   662 627
Stated interest rate on debt agreement   5.00% 5.00%
Retained Earnings / (Accumulated Deficit) [Member]
     
Dividends per share $ 0.10 $ 0.10 $ 0.10
Accumulated Other Comprehensive Income (Loss) [Member]
     
Tax effect on fair value of interest rate swap agreements 6,514 1,035 1,527
Tax benefit associated with change in pension actuarial loss $ 460 $ 98 $ 193