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Compensation Plans: Stock Based (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Equity Plan |  |  |  |  |  |
Number of shares available for grant | 3,800,000 |  |  |  |  |
Impact outright issuance of one share has on number of available shares | 1 |  |  |  |  |
Impact of issuance of one performance share award on available shares under the equity incentive plan | 2 |  |  |  |  |
Director Shares |  |  |  |  |  |
Stock-based compensation expense | $ 32,347,000 |  | $ 30,185,000 |  | $ 26,824,000 |
Shares Issued to the Board of Directors [Member] |  |  |  |  |  |
Director Shares |  |  |  |  |  |
Stock issued from treasury to non-employee directors (in shares) | 28,169 |  | 30,486 |  | 21,568 |
Stock-based compensation expense | 1,400,000 |  | 1,300,000 |  | 1,200,000 |
Performance Shares [Member] |  |  |  |  |  |
Equity Plan |  |  |  |  |  |
Unrecognized stock based compensation expense | 18,800,000 |  |  |  |  |
RSUs |  |  |  |  |  |
Non-vested at the beginning of the period (in shares) | 669,308 | [1] | 885,894 | [1] | 1,110,666 | [1]
Granted (in shares) | 274,831 | [1] | 314,853 | [1] | 266,282 | [1]
Vested (in shares) | (345,005) | [1] | (493,679) | [1] | (364,172) | [1]
Forfeited (in shares) | (26,665) | [1] | (37,760) | [1] | (126,882) | [1]
Non-vested at the end of the period (in shares) | 572,469 | [1] | 669,308 | [1] | 885,894 | [1]
Weighted Average Grant Date Fair Value |  |  |  |  |  |
Non-vested outstanding at the beginning of the period (in dollars per share) | $ 63.91 | [1] | $ 57.52 | [1] | $ 39.48 | [1]
Granted (in dollars per share) | $ 64.13 | [1] | $ 51.98 | [1] | $ 91.45 | [1]
Vested (in dollars per share) | $ 60.06 | [1] | $ 44.72 | [1] | $ 35.74 | [1]
Forfeited (in dollars per share) | $ 69.74 | [1] | $ 65.35 | [1] | $ 33.32 | [1]
Non-vested outstanding at the end of the period (in dollars per share) | $ 66.07 | [1] | $ 63.91 | [1] | $ 57.52 | [1]
Multiplier assumed | 1 |  |  |  |  |
Performance measurement period | 3 |  |  |  |  |
Common stock awards vesting multiplier, low end of range | 0 |  |  |  |  |
Common stock awards vesting multiplier, high end of range | 2 |  |  |  |  |
Fair value of PSUs/RSUs Granted in Period | 17,600,000 |  | 16,400,000 |  | 24,300,000 |
PSU/RSU Vesting Increment | 0.33 |  |  |  |  |
Fair value of PSUs/RSUs Vested in Period | 20,700,000 |  | 22,100,000 |  | 13,000,000 |
Multiplier Applied to PSU Awards at Settlement | 1.725 |  | 2 |  | 0.8 |
Stock issued for settlement, PSU, net of tax (in shares) | 387,461 |  | 812,562 |  | 206,468 |
Shares held for settlement of income and payroll tax obligations (in shares) | 200,050 |  | 406,866 |  | 98,955 |
Director Shares |  |  |  |  |  |
Stock-based compensation expense | 16,800,000 |  | 18,200,000 |  | 19,700,000 |
First Anniversary [Member] | Performance Shares [Member] |  |  |  |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
PSU/RSU Vesting Increment |  |  | 0.14 |  |  |
Second Anniversary [Member] | Performance Shares [Member] |  |  |  |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
PSU/RSU Vesting Increment |  |  | 0.29 |  |  |
Third Anniversary [Member] | Performance Shares [Member] |  |  |  |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
PSU/RSU Vesting Increment |  |  | 0.57 |  |  |
Cash Bonus Plan [Member] |  |  |  |  |  |
Cash Bonus Plan |  |  |  |  |  |
Percent of base compensation | 200.00% |  |  |  |  |
Accrued cash bonus plan expense | $ 41,800,000 |  | $ 16,300,000 |  | $ 23,900,000 |
[1] | The number of awards assumes a one multiplier. The final number of shares of common stock issued may vary depending on the ending three-year performance multiplier, which ranges from zero to two.

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(e) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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