v2.4.0.8

Stock-Based Compensation Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2014
Share-based Compensation [Abstract] |
Stock-Based Compensation Expense and Related Tax Benefit [Table Text Block] | For the three and nine months ended September 30, stock-based compensation expense and the related tax benefit were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
| (in thousands)
Stock options | $ | 606 |  |  | $ | 537 |  |  | $ | 1,706 |  |  | $ | 1,529 |
Restricted stock units | 2,413 |  |  | 3,258 |  |  | 10,307 |  |  | 11,651 |
Unrestricted stock awards | 230 |  |  | 204 |  |  | 690 |  |  | 606 |
ESPP | — |  |  | 155 |  |  | — |  |  | 490 |
Total stock-based compensation | $ | 3,249 |  |  | $ | 4,154 |  |  | $ | 12,703 |  |  | $ | 14,276 |
Related tax benefit | $ | 850 |  |  | $ | 1,085 |  |  | $ | 3,523 |  |  | $ | 3,838 |
Stock Options, Valuation Assumptions [Table Text Block] | The fair values of stock options granted were estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2014 |  | 2013 (1) |  | 2014 |  | 2013
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Expected volatility | 33.6 | % |  | — | % |  | 39.3 | % |  | 38.1 | %
Risk-free interest rate | 1.9 | % |  | — | % |  | 1.7 | % |  | 1.0 | %
Expected term (years) | 5.5 |  |  | — |  |  | 5.5 |  |  | 5.5 |
Employee Stock Options Activity [Table Text Block] | A summary of our stock option activity for the nine months ended September 30 is as follows:
| Shares |  | Weighted Average Exercise Price per Share |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value(1) |  | Weighted Average Grant Date Fair Value
| (in thousands) |  |  |  | (years) |  | (in thousands) |  |
Outstanding, January 1, 2013 | 1,137 |  |  | $ | 54.06 |  |  | 4.8 |  | $ | 3,815 |  |  |
Granted | 128 |  |  | 42.76 |  |  |  |  |  |  | $ | 15.44 |
Exercised | (53 | ) |  | 22.40 |  |  |  |  | $ | 1,067 |  |  |
Expired | (11 | ) |  | 49.04 |  |  |  |  |  |  |
Outstanding, September 30, 2013 | 1,201 |  |  | $ | 54.32 |  |  | 4.8 |  | $ | 2,090 |  |  |
Outstanding, January 1, 2014 | 1,180 |  |  | $ | 54.79 |  |  | 4.6 |  | $ | 1,300 |  |  |
Granted | 160 |  |  | 35.65 |  |  |  |  |  |  | $ | 13.65 |
Exercised | (41 | ) |  | 26.17 |  |  |  |  | $ | 546 |  |  |
Forfeited | (7 | ) |  | 44.06 |  |  |  |  |  |  |
Expired | (141 | ) |  | 69.24 |  |  |  |  |  |  |
Outstanding, September 30, 2014 | 1,151 |  |  | $ | 51.42 |  |  | 5.1 |  | $ | 1,011 |  |  |
Exercisable, September 30, 2014 | 797 |  |  | $ | 56.78 |  |  | 3.4 |  | $ | 396 |  |  |
Expected to vest, September 30, 2014 | 341 |  |  | $ | 39.40 |  |  | 8.7 |  | $ | 586 |  |  |
(1) | The aggregate intrinsic value of outstanding stock options represents amounts that would have been received by the optionees had all in- the-money options been exercised on that date. Specifically, it is the amount by which the market value of our stock exceeded the exercise price of the outstanding in-the-money options before applicable income taxes, based on our closing stock price on the last business day of the period. The aggregate intrinsic value of stock options exercised during the period is calculated based on our stock price at the date of exercise.
Restricted Stock Units, Valuation Assumptions | The weighted-average assumptions used to estimate the fair value of performance-based restricted stock units granted and the resulting weighted average fair-value are as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2014 |  | 2013 (1) |  | 2014 |  | 2013
Dividend yield | — | % |  | — | % |  | — | % |  | — | %
Expected volatility | 30.1 | % |  | — | % |  | 32.3 | % |  | 39.1 | %
Risk-free interest rate | 0.7 | % |  | — | % |  | 0.4 | % |  | 0.3 | %
Expected term (years) | 2.3 |  |  | — |  |  | 2.0 |  |  | 2.5 |
Weighted-average fair value | $ | 43.05 |  |  | $ | — |  |  | $ | 35.15 |  |  | $ | 45.03 |
(1) | There were no long-term performance restricted stock units granted for the three months ended September 30, 2013.
Restricted Stock Units Award Activity [Table Text Block] | The following table summarizes restricted stock unit activity for the nine months ended September 30:
| Number of Restricted Stock Units |  | Weighted Average Grant Date Fair Value |  | Aggregate Intrinsic Value(1)
| (in thousands) |  |  |  | (in thousands)
Outstanding, January 1, 2013 | 774 |  |  |  |  |
Granted (2) | 255 |  |  | $ | 42.51 |  |  |
Released | (260 | ) |  |  |  | $ | 13,860 |
Forfeited | (27 | ) |  |  |  |
Outstanding, September 30, 2013 | 742 |  |  |  |  |
Outstanding, January 1, 2014 | 658 |  |  |  |  |
Granted (2) | 330 |  |  | $ | 35.64 |  |  |
Released | (266 | ) |  |  |  | $ | 13,022 |
Forfeited | (29 | ) |  |  |  |
Outstanding, September 30, 2014 | 693 |  |  |  |  |
Vested but not released, September 30, 2014 | 10 |  |  |  |  | $ | 383 |
Expected to vest, September 30, 2014 | 588 |  |  |  |  | $ | 23,125 |
(1) | The aggregate intrinsic value is the market value of the stock, before applicable income taxes, based on the closing price on the stock release dates or at the end of the period for restricted stock units expected to vest.
(2) | Restricted stock units granted in 2013 and 2014 do not include awards under the Performance Award Agreement for the respective years, as these awards are not granted until attainment of annual performance goals has been determined at the conclusion of the performance period, which had not occurred as of September 30, 2013 and 2014, respectively.
Nonrestricted Stock Awards Activity [Table Text Block] | The following table summarizes unrestricted stock award activity for the three and nine months ended September 30:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
| (in thousands, except per share data)
Shares of unrestricted stock granted | 6 |  |  | 5 |  |  | 18 |  |  | 14 |
Weighted average grant date fair value per share | $ | 41.42 |  |  | $ | 42.83 |  |  | $ | 39.19 |  |  | $ | 44.50 |
Employee Stock Purchase Plan (ESPP) Activity [Table Text Block] | The following table summarizes ESPP activity for the three and nine months ended September 30:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
| (in thousands, except per share data)
Shares of stock sold to employees(1) | 13 |  |  | 23 |  |  | 47 |  |  | 70 |
Weighted average fair value per ESPP award(2) | $ | — |  |  | $ | 6.42 |  |  | $ | — |  |  | $ | 6.61 |
(1) | Stock sold to employees during each fiscal quarter under the ESPP is associated with the offering period ending on the last day of the previous fiscal quarter.
(2) | Effective October 1, 2013, the ESPP is no longer compensatory, and therefore the weighted average fair value per award is not applicable for the three and nine months ended September 30, 2014.

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock units, including, but not limited to: (a) expected term of stock units, (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 components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: 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 + Details
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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of employee stock purchase plan activity. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock awards granted to nonemployee directors that were outstanding at the beginning and end of the year, and the number of awards 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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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