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Credit Agreements (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 3 Months Ended
May 30, 2012
Mar. 31, 2013
Feb. 11, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2013
Base rate [Member]
Mar. 31, 2013
Adjusted LIBOR rate [Member]
Mar. 31, 2013
LIBOR Floor Rate [Member]
Feb. 09, 2012
Tranche A term loan [Member]
Feb. 09, 2012
Tranche B term loan [Member]
Feb. 09, 2012
Revolving credit facility [Member]
Mar. 31, 2013
Term Loan [Member]
Dec. 31, 2012
Term Loan [Member]
May 30, 2012
Term Loan [Member]
Mar. 31, 2013
ABL revolving credit facility [Member]
Dec. 31, 2012
ABL revolving credit facility [Member]
Mar. 31, 2013
ABL revolving credit facility [Member]
Base rate [Member]
Mar. 31, 2013
ABL revolving credit facility [Member]
Adjusted LIBOR rate [Member]
Mar. 31, 2013
ABL facility [Member]
Dec. 31, 2012
ABL facility [Member]
Mar. 31, 2013
Other lines of credit, as described below [Member]
Dec. 31, 2012
Other lines of credit, as described below [Member]
Short-term borrowings [Abstract]                                              
Short-term borrowings   $ 12,532   $ 12,550                               $ 0 $ 0 $ 12,532 $ 12,550
Long-term debt [Abstract]                                              
Discount on debt   (14,798)   (16,482)                                      
Long-term debt ,gross   800,702   881,268                 815,500 897,750                  
Less current portion of debt   30,000   82,250                                      
Total   770,702   799,018                                      
Maximum borrowing capacity                   325,000 250,000 150,000     900,000 150,000              
Uncommitted incremental term loan facility                             125,000 50,000              
Cash dividend (in dollars per share) $ 6                                            
Covenant description   The ABL Credit Agreement requires the Borrower to maintain a minimum consolidated fixed charge coverage ratio of 1.0x, tested on a quarterly basis, when Availability plus the amount of Qualified Cash (up to $5,000) (as defined in the ABL Credit Agreement) under the ABL Facility is less than the greater of (i) 10.0% of the lesser of the aggregate commitments and the applicable borrowing base under the ABL Facility or (ii) $10,000. The ABL Credit Agreement also contains covenants and events of default substantially similar to those in the Term Loan Credit Agreement, as described above. There were no borrowings outstanding under the ABL Facility as of March 31, 2013 or December 31, 2012                                          
Percentage of term loan amortization (in hundredths)   0.25%                                          
Prepayment of Debt   80,000                                          
Basis spread on variable rate (in hundredths)             4.00% 5.00% 1.25%                 1.00% 2.00%        
Fixed charge coverage ratio in multiple                               1.0x              
Qualified Cash                               5,000              
Percentage of aggregate commitments (in hundredths)                               10.00%              
Amount availability under agreements as per covenants                               10,000              
Cash and cash equivalents   54,337   108,023 91,730 93,126                     54,337            
Line of credit facility amount available                               147,219              
Write off of original discount     $ 1,839