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Retirement and Share-based Compensation Plans Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | Changes in the number of stock options outstanding during the years ended December 31, 2012, 2011 and 2010 are as follows:
| Number of Shares |  | Weighted-Average Exercise Price per Share |  | Total Exercise Price
| (Dollars in thousands, except per share data)
Outstanding at January 1, 2010 | 3,142,189 |  |  | $ | 8.79 |  |  | $ | 27,620 |
Granted | 1,794,200 |  |  | 8.76 |  |  | 15,726 |
Canceled | (120,000 | ) |  | 8.64 |  |  | (1,037 | )
Exercised | (695,539 | ) |  | 8.80 |  |  | (6,122 | )
Outstanding at December 31, 2010 | 4,120,850 |  |  | 8.78 |  |  | 36,187 |
Granted | 1,486,850 |  |  | 12.99 |  |  | 19,309 |
Canceled | (177,500 | ) |  | 9.66 |  |  | (1,714 | )
Exercised | (585,350 | ) |  | 8.00 |  |  | (4,685 | )
Outstanding at December 31, 2011 | 4,844,850 |  |  | 10.13 |  |  | 49,097 |
Granted | 1,558,900 |  |  | 7.60 |  |  | 11,854 |
Canceled | (28,050 | ) |  | 8.74 |  |  | (245 | )
Exercised | (643,250 | ) |  | 8.77 |  |  | (5,642 | )
Outstanding at December 31, 2012 | 5,732,450 |  |  | 9.61 |  |  | $ | 55,064 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] | The following table summarizes information about stock options outstanding at December 31, 2012:
|  | Stock Options Outstanding |  | Stock Options Vested
Range of Exercise Prices |  | Number of Awards |  | Remaining Life (yrs) |  | Weighted-Average Exercise Price Per Share |  | Number of Awards |  | Remaining Life (yrs) |  | Weighted-Average Exercise Price Per Share
$5.07 - $9.16 |  | 1,500,000 |  |  | 3.59 |  | $ | 7.70 |  |  | 1,500,000 |  |  | 3.59 |  | $ | 7.70 |
$9.49 - $11.46 |  | 2,714,350 |  |  | 5.56 |  | 10.35 |  |  | 2,218,350 |  |  | 5.34 |  | 10.47 |
$11.88 - $14.34 |  | 1,518,100 |  |  | 5.37 |  | 12.97 |  |  | 1,413,100 |  |  | 5.12 |  | 13.03 |
$5.07 - $14.34 |  | 5,732,450 |  |  | 5.00 |  | 10.35 |  |  | 5,131,450 |  |  | 4.77 |  | 10.36 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions, Agent Stock Options [Table Text Block] | The fair value for each stock option granted to agents during the years ended December 31, 2012, 2011 and 2010 was estimated using a Black-Scholes option valuation model until the grant date, at which time the options are included as permanent equity, with the following assumptions:
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
Average risk-free interest rate | 0.51 | % |  | 0.58 | % |  | 1.44 | %
Dividend yield | 1.2 | % |  | 1.2 | % |  | 0.8 | %
Average expected life (years) | 3.75 |  |  | 3.75 |  |  | 3.75 |
Volatility | 41.1 | % |  | 67.2 | % |  | 68.0 | %
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair value for each stock option granted to officers, directors and employees during the years ended December 31, 2012, 2011 and 2010 was estimated at the date of grant using a Black-Scholes option valuation model with the following assumptions:
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
| Directors and Retirement Eligible Employees |  | Non-Retirement Eligible Employees |  | Directors and Retirement Eligible Employees |  | Non-Retirement Eligible Employees |  | Directors and Retirement Eligible Employees |  | Non-Retirement Eligible Employees
Average risk-free interest rate | 0.76 | % |  | 1.36 | % |  | 1.66 | % |  | 2.00 | % |  | 2.17 | % |  | 2.99 | %
Dividend yield | 1.1 | % |  | 1.3 | % |  | 0.8 | % |  | 1.0 | % |  | 0.8 | % |  | 0.8 | %
Average expected life (years) | 5 |  |  | 8 |  |  | 5 |  |  | 8 |  |  | 5 |  |  | 8 |
Volatility | 62.5 | % |  | 50.9 | % |  | 66.1 | % |  | 52.0 | % |  | 75.7 | % |  | 75.7 | %

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 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 64 -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 f -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 Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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