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Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, unless otherwise specified | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | ---
Beginning of year at Dec. 31, 2010 |  | $ 74,188 | $ 78 | $ (740) | $ 1,721,289
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of stock options |  | 1,951 | 0 |  |
Share-based compensation expense | 899 | 439 | 460 |  |
Tax benefit on sales of incentive stock options | 56 | 56 |  |  |
Other comprehensive income, net of tax |  |  |  | 740 |
Net income | 191,164 |  |  |  | 191,164
Dividends paid to shareholders |  |  |  |  | (132,142)
End of year at Dec. 31, 2011 | 1,857,483 | 76,634 | 538 | 0 | 1,780,311
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of stock options |  | 2,492 | 0 |  |
Share-based compensation expense | (370) | 168 | (538) |  |
Tax benefit on sales of incentive stock options | 86 | 86 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |
Net income | 116,911 |  |  |  | 116,911
Dividends paid to shareholders |  |  |  |  | (134,105)
End of year at Dec. 31, 2012 | 1,842,497 | 79,380 | 0 | 0 | 1,763,117
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Exercise of stock options |  | 1,884 | (438) |  |
Share-based compensation expense | 974 | 125 | 849 |  |
Tax benefit on sales of incentive stock options | 202 | 202 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |
Net income | 112,143 |  |  |  | 112,143
Dividends paid to shareholders |  |  |  |  | (134,776)
End of year at Dec. 31, 2013 | $ 1,822,486 | $ 81,591 | $ 411 | $ 0 | $ 1,740,484

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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e565-108580 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 + Details
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