Exhibit 12
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
| Three Months | ||||||||||||||||||||||||
| Ended | ||||||||||||||||||||||||
| March 31, | December 31, | December 31, | December 31, | December 31, | December 31, | |||||||||||||||||||
| 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | |||||||||||||||||||
(In thousands) | ||||||||||||||||||||||||
| Earnings before income taxes | $ | 56,367 | $ | 263,891 | $ | 233,442 | $ | 175,860 | $ | 127,830 | $ | 47,745 | ||||||||||||
| Add: | ||||||||||||||||||||||||
| Interest on indebtedness | 13,465 | 33,311 | 29,227 | 36,234 | 34,227 | 39,324 | ||||||||||||||||||
| Amortization of debt expense | 282 | 796 | 704 | 939 | 1,098 | 1,741 | ||||||||||||||||||
| Portion of rents representative of the interest factor | 2,781 | 8,578 | 7,735 | 7,392 | 7,089 | 7,807 | ||||||||||||||||||
| Deduct: | ||||||||||||||||||||||||
| Undistributed earnings from less-than-50-percent-owned entities | (370 | ) | 427 | (61 | ) | (631 | ) | (1,055 | ) | (1,777 | ) | |||||||||||||
| Earnings (as defined) | $ | 72,525 | $ | 307,003 | $ | 271,047 | $ | 219,794 | $ | 169,189 | $ | 94,840 | ||||||||||||
| Fixed charges: | ||||||||||||||||||||||||
| Interest on indebtedness | 13,465 | 33,311 | 29,227 | 36,234 | 34,227 | 39,324 | ||||||||||||||||||
| Amortization of debt expense | 282 | 796 | 704 | 939 | 1,098 | 1,741 | ||||||||||||||||||
| Portion of rents representative of the interest factor | 2,781 | 8,578 | 7,735 | 7,392 | 7,089 | 7,807 | ||||||||||||||||||
| Total fixed charges | $ | 16,528 | $ | 42,685 | $ | 37,666 | $ | 44,565 | $ | 42,414 | $ | 48,872 | ||||||||||||
| Ratio of earnings to fixed charges | 4.4 | x | 7.2 | x | 7.2 | x | 4.9 | x | 4.0 | x | 1.9x | |||||||||||||