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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of restricted stock units issued and compensation expense | The following table summarizes restricted stock units issued and the compensation expense recorded for 2012, 2011 and 2010: Stock-Based Compensation Expense
|  | Restricted Stock Units |  | Fair Value per Unit |  | Expense |
(Dollars in thousands, except per unit) |  |  |  | 2012 |  | 2011 |  | 2010 |
Directors: |  |  |  |  |  |  |  |  |  |  |
May 1, 2009 |  | 16,000 |  |  | 27.28 |  |  | $ | — |  |  | $ | — |  |  | $ | 145 |  |
May 3, 2010 |  | 16,000 |  |  | 30.99 |  |  | — |  |  | 165 |  |  | 331 |  |
May 2, 2011 |  | 20,192 |  |  | 34.79 |  |  | 234 |  |  | 468 |  |  | — |  |
May 2, 2012 |  | 27,930 |  |  | 21.58 |  |  | 402 |  |  | — |  |  | — |  |
December 4, 2012 |  | 2,688 |  |  | 19.95 |  |  | — |  |  | — |  |  | — |  |
Employees: |  |  |  |  |  |  |  |  |  |  |
January 23, 2007 |  | 101,700 |  |  | 38.25 |  |  | — |  |  | — |  |  | 41 |  |
January 22, 2008 |  | 130,950 |  |  | 45.95 |  |  | — |  |  | 68 |  |  | 1,601 |  |
January 27, 2009 |  | 106,625 |  |  | 25.15 |  |  | 43 |  |  | 614 |  |  | 667 |  |
November 19, 2009 |  | 15,000 |  |  | 31.90 |  |  | — |  |  | 12 |  |  | 298 |  |
January 25, 2010 |  | 1,000 |  |  | 31.49 |  |  | 1 |  |  | 10 |  |  | 20 |  |
September 22, 2010 |  | 25,000 |  |  | 23.47 |  |  | 20 |  |  | 373 |  |  | 194 |  |
April 26, 2011 |  | 3,750 |  |  | 32.10 |  |  | 44 |  |  | 29 |  |  | — |  |
September 20, 2011 |  | 13,500 |  |  | 21.18 |  |  | 151 |  |  | 111 |  |  | — |  |
January 23, 2012 |  | 30,000 |  |  | 17.81 |  |  | 168 |  |  | — |  |  | — |  |
March 16, 2012 |  | 44,268 |  |  | 21.39 |  |  | 130 |  |  | — |  |  | — |  |
May 4, 2012 |  | 56,233 |  |  | 17.34 |  |  | 213 |  |  | — |  |  | — |  |
September 10, 2012 |  | 5,985 |  |  | 19.05 |  |  | 11 |  |  | — |  |  | — |  |
November 16, 2012 |  | 5,000 |  |  | 16.45 |  |  | 3 |  |  | — |  |  | — |  |
Total |  |  |  |  |  |  |  | $ | 1,420 |  |  | $ | 1,850 |  |  | $ | 3,297 |  |
Schedule of restricted stock unit activity | Restricted stock unit activity for 2012, 2011 and 2010 was as follows:
|  | Restricted Stock Units |  | Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2010 |  | 229,491 |  |  | $ | 34.45 |
Granted |  | 42,000 |  |  | 26.53 |
Vested |  | (124,424 | ) |  | 35.81 |
Forfeited |  | (6,532 | ) |  | 35.23 |
Nonvested at December 31, 2010 |  | 140,535 |  |  | 30.83 |
Granted |  | 37,442 |  |  | 29.61 |
Vested |  | (113,136 | ) |  | 33.55 |
Forfeited |  | (2,200 | ) |  | 25.15 |
Nonvested at December 31, 2011 |  | 62,641 |  |  | 25.39 |
Granted |  | 172,104 |  |  | 19.23 |
Vested |  | (67,861 | ) |  | 24.86 |
Forfeited |  | (25,411 | ) |  | 20.35 |
Nonvested at December 31, 2012 |  | 141,473 |  |  | $ | 19.19 |
Schedule of stock option activity | Stock option activity for 2012, 2011 and 2010 was as follows:
|  | Shares Under Option |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value (in millions)(a)
Outstanding, January 1, 2010 |  | 389,970 |  |  | $ | 15.66 |  |  | $ | 6.7 |
Exercised |  | (115,493 | ) |  | 13.77 |  |  | — |
Expired |  | (805 | ) |  | 16.33 |  |  | — |
Outstanding, December 31, 2010 |  | 273,672 |  |  | 16.46 |  |  | 3.3 |
Granted |  | 617,500 |  |  | 31.75 |  |  | — |
Exercised |  | (199,032 | ) |  | 15.95 |  |  | — |
Forfeited/Expired |  | (30,300 | ) |  | 30.92 |  |  | — |
Outstanding, December 31, 2011 |  | 661,840 |  |  | 30.22 |  |  | 0.2 |
Exercised |  | (38,900 | ) |  | 18.23 |  |  | — |
Forfeited/Expired |  | (294,940 | ) |  | 31.29 |  |  | — |
Outstanding, December 31, 2012 |  | 328,000 |  |  | $ | 30.67 |  |  | $ | 0.2 |
(a) | Intrinsic value is defined as the difference between the current market value and the exercise price, for those options where the market price exceeds the exercise price.
Schedule of outstanding and exercisable options | The following table summarizes information concerning outstanding and exercisable options at December 31, 2012:
|  | Options Outstanding |  | Options Exercisable
Range of Exercisable Prices |  | Vested |  | Unvested |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Life in Years |  | Number Exercisable |  | Weighted Average Exercise Price Per Share
$16.96 - $16.96 |  | 24,000 |  |  | — |  |  | $ | 16.96 |  |  | 0.33 |  | 24,000 |  |  | $ | 16.96 |
$31.75 - $31.75 |  | — |  |  | 304,000 |  |  | 31.75 |  |  | 5.07 |  | — |  |  | — |
|  | 24,000 |  |  | 304,000 |  |  | $ | 30.67 |  |  | 4.72 |  | 24,000 |  |  | $ | 16.96 |
Schedule of weighted-average grant-date fair value of unvested options | Weighted-average grant-date fair value of unvested options during the year ended December 31, 2012 was as follows:
|  | Shares Under Option |  | Weighted Average Grant-Date Fair Value
Outstanding, January 1, 2012 |  | 589,000 |  |  | $ | 10.90 |
Forfeited |  | (285,000 | ) |  | 10.90 |
Outstanding, December 31, 2012 |  | 304,000 |  |  | $ | 10.90 |
Schedule of stock appreciation rights valuation assumptions | The fair value of each SAR grant was estimated on the date of grant using a Black-Scholes pricing model with the following assumptions:
|  | March 2012 Grant |  | May 2012 Grant |  | September 2012 Grant
Risk-free interest rate |  | 1.56 | % |  | 1.18 | % |  | 1.00 | %
Dividend yield |  | 3.50 | % |  | 4.20 | % |  | 3.80 | %
Expected life (years) |  | 6.5 |  |  | 6.5 |  |  | 6.5 |
Volatility |  | 43.9 | % |  | 44.0 | % |  | 44.3 | %
SAR grant price |  | $ | 23.73 |  |  | $ | 19.65 |  |  | $ | 21.37 |
Fair value of SAR award |  | $ | 6.10 |  |  | $ | 4.77 |  |  | $ | 6.20 |
Schedule of Stock Appreciation Rights award activity | A summary of activity relating to SARs for the year ended December 31, 2012 was as follows:
|  | SARs
|  | Number of Shares |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value (in millions) |  | Weighted Average Remaining Contractual Term (Years)
Outstanding, January 1, 2012 |  | — |  |  | $ | — |  |  | $ | — |  |  |
Granted |  | 707,012 |  |  | 21.23 |  |  |  |  |
Forfeited/expired |  | (181,725 | ) |  | 21.23 |  |  |  |  |
Outstanding, December 31, 2012 |  | 525,287 |  |  | $ | 21.23 |  |  | $ | 1.2 |  |  | 9.3

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