Benefit Plans	12 Months Ended
Dec. 31, 2012
Benefit Plans
Benefit Plans	13. Benefit Plans The Company sponsors defined contribution plans that cover domestic and non-domestic employees following the completion of an eligibility period. Employer contribution expenses under these plans totaled $41.5 million, $38.9 million and $40.1 million during the years ended December 31, 2012, 2011 and 2010, respectively. The Company has active and non-active non-qualified deferred compensation plans for senior management, certain highly compensated employees and directors. Certain of the active plans permit existing participants to defer a portion of their compensation until termination of their employment, at which time payment of amounts deferred is made in a lump sum or annual installments. Deferred amounts earn interest at a rate determined by the Board of Directors or are credited with deemed gains or losses of the underlying hypothetical investments. Amounts deferred under these plans were approximately $46.4 million and $35.2 million at December 31, 2012 and 2011, respectively.

13. Benefit Plans

The Company sponsors defined contribution plans that cover domestic and non-domestic employees following the completion of an eligibility period. Employer contribution expenses under these plans totaled $41.5 million, $38.9 million and $40.1 million during the years ended December 31, 2012, 2011 and 2010, respectively.

The Company has active and non-active non-qualified deferred compensation plans for senior management, certain highly compensated employees and directors. Certain of the active plans permit existing participants to defer a portion of their compensation until termination of their employment, at which time payment of amounts deferred is made in a lump sum or annual installments. Deferred amounts earn interest at a rate determined by the Board of Directors or are credited with deemed gains or losses of the underlying hypothetical investments. Amounts deferred under these plans were approximately $46.4 million and $35.2 million at December 31, 2012 and 2011, respectively.