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Equity Incentive Awards (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity Incentive Awards [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity |
|  | 2015 |  | 2014 |  | 2013
(in thousands, except exercise price data) |  | Options |  | Weighted Average Exercise Price |  | Options |  | Weighted Average Exercise Price |  | Options |  | Weighted Average Exercise Price
Outstanding at beginning of year |  | 3,371 |  |  | $ | 14.98 |  |  | 3,329 |  |  | $ | 16.94 |  |  | 3,075 |  |  | $ | 17.57 |
Granted |  | 1,207 |  |  | 6.83 |  |  | 643 |  |  | 11.76 |  |  | 499 |  |  | 14.91 |
Exercised |  | (19 | ) |  | 11.14 |  |  | (32 | ) |  | 10.22 |  |  | (82 | ) |  | 12.25 |
Expired |  | (187 | ) |  | 27.29 |  |  | (476 | ) |  | 24.78 |  |  | (136 | ) |  | 27.86 |
Forfeited |  | (155 | ) |  | 8.51 |  |  | (93 | ) |  | 13.79 |  |  | (27 | ) |  | 13.58 |
Outstanding at end of year |  | 4,217 |  |  | 12.35 |  |  | 3,371 |  |  | 14.98 |  |  | 3,329 |  |  | 16.94 |
Exercisable at end of year |  | 2,686 |  |  | $ | 14.53 |  |  | 2,417 |  |  | $ | 15.89 |  |  | 2,483 |  |  | $ | 17.92 |
Schedule of Nonvested Restricted Stock Units Activity |
|  | Shares |  | Weighted Average Grant Date Fair Value
|  | (in thousands) |  |
Outstanding at December 31, 2014 |  | 447 |  |  | $ | 12.88 |
Granted |  | 452 |  |  | 6.23 |
Vested |  | (166 | ) |  | 12.91 |
Forfeited |  | (96 | ) |  | 8.98 |
Nonvested at December 31, 2015 |  | 637 |  |  | $ | 8.74 |

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- Definition Equity Incentive Awards [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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) -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 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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