Quarterly report pursuant to Section 13 or 15(d)

Non-Controlling Interest Non-Controlling Interest (Schedule of Equity) (Details)

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Non-Controlling Interest Non-Controlling Interest (Schedule of Equity) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Noncontrolling Interest [Line Items]        
Balance, beginning of period     $ 1,166,167  
Net income (loss) (7,330) (7,901) 2,772 (4,003)
Other comprehensive income (loss):        
Unrealized holding gains (losses) on available for sale securities 7 (31) 16 (32)
Derivative holding gains (losses) 168 1,294 1,598 (583)
Foreign currency translation adjustments (5,517) (8,311) (18,174) (3,704)
Cash dividends     (15,081)  
Issuance of common stock under employee stock plans, net     9,031  
Capital contribution from non-controlling interest     8,000  
Tax adjustment from stock plans     845  
Stock-based compensation expense     4,282  
Balance, end of period 1,159,456 1,058,718 1,159,456 1,058,718
Parent [Member]
       
Noncontrolling Interest [Line Items]        
Balance, beginning of period     1,166,167  
Net income (loss)     3,025  
Other comprehensive income (loss):        
Unrealized holding gains (losses) on available for sale securities     16  
Derivative holding gains (losses)     1,598  
Foreign currency translation adjustments     (18,252)  
Cash dividends     (15,081)  
Issuance of common stock under employee stock plans, net     9,031  
Capital contribution from non-controlling interest     0  
Tax adjustment from stock plans     845  
Stock-based compensation expense     4,282  
Balance, end of period 1,151,631   1,151,631  
Noncontrolling Interest [Member]
       
Noncontrolling Interest [Line Items]        
Balance, beginning of period     0  
Net income (loss)     (253)  
Other comprehensive income (loss):        
Unrealized holding gains (losses) on available for sale securities     0  
Derivative holding gains (losses)     0  
Foreign currency translation adjustments     78  
Cash dividends     0  
Issuance of common stock under employee stock plans, net     0  
Capital contribution from non-controlling interest     8,000  
Tax adjustment from stock plans     0  
Stock-based compensation expense     0  
Balance, end of period $ 7,825   $ 7,825