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Stock-Based Compensation (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |
Deferred Compensation Liability, Current | $ 0.0 | $ 1.0 | $ 0.0
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options | $ 0.5 | $ 0.3 | $ 0.1
$8.18 - $9.55 Range [Member] |  |  |
Summarized information about outstanding and exercisable stock option |  |  |
Range of exercise prices, Lower limit | $ 8.18 |  |
Range of exercise prices, Upper limit | $ 9.55 |  |
Shares outstanding | 816 |  |
Weighted average remaining contractual price | 1 year 3 months 18 days |  |
Weighted average exercise price | $ 8.30 |  |
Shares exercisable | 484 |  |
Weighted average exercise price | $ 8.35 |  |
$10.49 - $17.80 Range [Member] |  |  |
Summarized information about outstanding and exercisable stock option |  |  |
Range of exercise prices, Lower limit | 10.49 |  |
Range of exercise prices, Upper limit | $ 17.80 |  |
Shares outstanding | 925 |  |
Weighted average remaining contractual price | 2 years 10 months 13 days |  |
Weighted average exercise price | $ 13.55 |  |
Shares exercisable | 302 |  |
Weighted average exercise price | $ 10.58 |  |
$18.77 - $22.70 Range [Member] |  |  |
Summarized information about outstanding and exercisable stock option |  |  |
Range of exercise prices, Lower limit | 18.77 |  |
Range of exercise prices, Upper limit | $ 22.70 |  |
Shares outstanding | 862 |  |
Weighted average remaining contractual price | 3 years 18 days |  |
Weighted average exercise price | $ 21.84 |  |
Shares exercisable | 65 |  |
Weighted average exercise price | $ 21.21 |  |
$23.40-27.33 Range [Member] |  |  |
Summarized information about outstanding and exercisable stock option |  |  |
Range of exercise prices, Lower limit | 23.40 |  |
Range of exercise prices, Upper limit | $ 27.33 |  |
Shares outstanding | 284 |  |
Weighted average remaining contractual price | 2 years 3 months 4 days |  |
Weighted average exercise price | $ 24.22 |  |
Shares exercisable | 112 |  |
Weighted average exercise price | $ 23.49 |  |

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20028-108363 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361 + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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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