|
Basis of Presentation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
|
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Jun. 30, 2011
|
Mar. 31, 2011
|
Dec. 31, 2010
|
Sep. 30, 2010
|
Jun. 30, 2010
|
Mar. 31, 2010
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2008
|
| Consolidated Balance Sheet |
|
|
|
|
|
|
|
|
|
|
|
|
| Paid-in-capital in excess of par value |
$ 291,950 |
|
|
|
$ 248,693 |
|
|
|
$ 291,950 |
$ 248,693 |
|
|
| Retained earnings |
305,931 |
|
|
|
265,686 |
|
|
|
305,931 |
265,686 |
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Income Taxes |
|
|
|
|
|
|
|
|
147,201 |
80,880 |
87,582 |
|
| Net Income |
105,400 |
108,000 |
111,200 |
88,000 |
86,300 |
78,900 |
82,200 |
51,800 |
412,578 |
299,215 |
203,346 |
|
| Basic earnings per share |
$ 0.91 |
$ 0.92 |
$ 0.93 |
$ 0.74 |
$ 0.73 |
$ 0.67 |
$ 0.69 |
$ 0.43 |
$ 3.51 |
$ 2.51 |
$ 1.66 |
|
| Diluted earnings per share |
$ 0.86 |
$ 0.87 |
$ 0.88 |
$ 0.70 |
$ 0.69 |
$ 0.63 |
$ 0.65 |
$ 0.41 |
$ 3.30 |
$ 2.37 |
$ 1.61 |
|
| Common Share Amounts Used to Compute Basic and Diluted Earnings Per Share |
|
|
|
|
|
|
|
|
|
|
|
|
| Weighted average shares used in basic computations |
|
|
|
|
|
|
|
|
117,540 |
119,004 |
122,442 |
|
| Dilutive effect of exercise of equity grants outstanding |
|
|
|
|
|
|
|
|
7,046 |
7,059 |
3,468 |
|
| Dilutive effect of warrants |
|
|
|
|
|
|
|
|
260 |
432 |
284 |
|
| Weighted average shares used in diluted computations |
|
|
|
|
|
|
|
|
124,846 |
126,495 |
126,194 |
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Excess tax benefit from exercise of stock options, SARs and restricted stock grants |
|
|
|
|
|
|
|
|
27,450 |
8,045 |
3,587 |
|
| Balance at December 31, 2010 |
560,188 |
|
|
|
487,212 |
|
|
|
560,188 |
487,212 |
359,311 |
241,731 |
| Net Income |
105,400 |
108,000 |
111,200 |
88,000 |
86,300 |
78,900 |
82,200 |
51,800 |
412,578 |
299,215 |
203,346 |
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
105,400 |
108,000 |
111,200 |
88,000 |
86,300 |
78,900 |
82,200 |
51,800 |
412,578 |
299,215 |
203,346 |
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
(27,450) |
(7,728) |
(3,266) |
|
| Net cash provided by operating activities |
|
|
|
|
|
|
|
|
509,331 |
389,084 |
285,056 |
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
27,450 |
7,728 |
3,266 |
|
| Net cash used in financing activities |
|
|
|
|
|
|
|
|
(337,799) |
(263,162) |
(213,327) |
|
|
Retained Earnings [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2010 |
305,931 |
|
|
|
265,686 |
|
|
|
305,931 |
265,686 |
159,705 |
72,507 |
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
|
Comprehensive Income [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
| Total comprehensive income |
|
|
|
|
|
|
|
|
402,054 |
295,326 |
208,564 |
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
412,578 |
299,215 |
203,346 |
|
|
As Reported [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Balance Sheet |
|
|
|
|
|
|
|
|
|
|
|
|
| Paid-in-capital in excess of par value |
|
|
|
|
257,375 |
|
|
|
|
257,375 |
|
|
| Retained earnings |
|
|
|
|
257,004 |
|
|
|
|
257,004 |
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Income Taxes |
|
|
|
|
|
|
|
|
|
89,562 |
|
|
| Net Income |
|
|
|
87,600 |
81,000 |
|
|
|
|
290,533 |
|
|
| Basic earnings per share |
|
|
|
$ 0.74 |
$ 0.69 |
|
|
|
|
$ 2.44 |
|
|
| Diluted earnings per share |
|
|
|
$ 0.71 |
$ 0.65 |
|
|
|
|
$ 2.33 |
|
|
| Common Share Amounts Used to Compute Basic and Diluted Earnings Per Share |
|
|
|
|
|
|
|
|
|
|
|
|
| Weighted average shares used in basic computations |
|
|
|
|
|
|
|
|
|
119,004 |
|
|
| Dilutive effect of exercise of equity grants outstanding |
|
|
|
|
|
|
|
|
|
5,076 |
|
|
| Dilutive effect of warrants |
|
|
|
|
|
|
|
|
|
432 |
|
|
| Weighted average shares used in diluted computations |
|
|
|
|
|
|
|
|
|
124,512 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Excess tax benefit from exercise of stock options, SARs and restricted stock grants |
|
|
|
|
|
|
|
|
|
16,727 |
|
|
| Balance at December 31, 2010 |
|
|
|
|
257,375 |
|
|
|
|
257,375 |
|
|
| Net Income |
|
|
|
87,600 |
81,000 |
|
|
|
|
290,533 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
87,600 |
81,000 |
|
|
|
|
290,533 |
|
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
|
(16,410) |
|
|
| Deferred Income Taxes |
|
|
|
|
|
|
|
|
|
(24,631) |
|
|
| Net cash provided by operating activities |
|
|
|
|
|
|
|
|
|
380,402 |
|
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
|
16,410 |
|
|
| Net cash used in financing activities |
|
|
|
|
|
|
|
|
|
(254,480) |
|
|
|
As Reported [Member] | Retained Earnings [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2010 |
|
|
|
|
257,004 |
|
|
|
|
257,004 |
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
|
As Reported [Member] | Comprehensive Income [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
| Total comprehensive income |
|
|
|
|
|
|
|
|
|
286,644 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
290,533 |
|
|
|
As Adjusted [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Balance Sheet |
|
|
|
|
|
|
|
|
|
|
|
|
| Paid-in-capital in excess of par value |
|
|
|
|
248,693 |
|
|
|
|
248,693 |
|
|
| Retained earnings |
|
|
|
|
265,686 |
|
|
|
|
265,686 |
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Income Taxes |
|
|
|
|
|
|
|
|
|
80,880 |
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Basic earnings per share |
|
|
|
|
|
|
|
|
|
$ 2.51 |
|
|
| Diluted earnings per share |
|
|
|
|
|
|
|
|
|
$ 2.37 |
|
|
| Common Share Amounts Used to Compute Basic and Diluted Earnings Per Share |
|
|
|
|
|
|
|
|
|
|
|
|
| Weighted average shares used in basic computations |
|
|
|
|
|
|
|
|
|
119,004 |
|
|
| Dilutive effect of exercise of equity grants outstanding |
|
|
|
|
|
|
|
|
|
7,059 |
|
|
| Dilutive effect of warrants |
|
|
|
|
|
|
|
|
|
432 |
|
|
| Weighted average shares used in diluted computations |
|
|
|
|
|
|
|
|
|
126,495 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Excess tax benefit from exercise of stock options, SARs and restricted stock grants |
|
|
|
|
|
|
|
|
|
8,045 |
|
|
| Balance at December 31, 2010 |
|
|
|
|
248,693 |
|
|
|
|
248,693 |
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
|
(7,728) |
|
|
| Deferred Income Taxes |
|
|
|
|
|
|
|
|
|
(33,313) |
|
|
| Net cash provided by operating activities |
|
|
|
|
|
|
|
|
|
389,084 |
|
|
| Excess tax benefits from share-based payment arrangements |
|
|
|
|
|
|
|
|
|
7,728 |
|
|
| Net cash used in financing activities |
|
|
|
|
|
|
|
|
|
(263,162) |
|
|
|
As Adjusted [Member] | Retained Earnings [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2010 |
|
|
|
|
265,686 |
|
|
|
|
265,686 |
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
|
As Adjusted [Member] | Comprehensive Income [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
| Total comprehensive income |
|
|
|
|
|
|
|
|
|
295,326 |
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
|
299,215 |
|
|
|
As Computed Under Prior Method [Member]
|
|
|
|
|
|
|
|
|
|
|
|
|
| Consolidated Statements of Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Income Taxes |
|
|
|
|
|
|
|
|
159,083 |
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
400,696 |
|
|
|
| Basic earnings per share |
|
|
|
|
|
|
|
|
$ 3.41 |
|
|
|
| Diluted earnings per share |
|
|
|
|
|
|
|
|
$ 3.25 |
|
|
|
| Changes in Shareholders' Equity and Comprehensive Income |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
400,696 |
|
|
|
| Consolidated Statement of Cash Flows |
|
|
|
|
|
|
|
|
|
|
|
|
| Net Income |
|
|
|
|
|
|
|
|
$ 400,696 |
|
|
|