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Stockholders' Equity - Stock Options Outstanding Rollforward (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Number of Options |  |  |
Outstanding at December 31, 2014 (in shares) | 1,205 |  |
Granted (in shares) | 120 |  |
Exercised (in shares) | (10) |  |
Expired, canceled or forfeited (in shares) | (138) |  |
Outstanding at December 31, 2015 (in shares) | 1,177 | 1,205 |
Exercisable at December 31, 2015 (in shares) | 687 |  |
Weighted Average Exercise Price |  |  |
Outstanding at December 31, 2014 (in dollars per share) | $ 11.65 |  |
Granted (in dollars per share) | 12.04 |  |
Exercised (in dollars per share) | 8.64 |  |
Expired, canceled or forfeited (in dollars per share) | 12.59 |  |
Outstanding at December 31, 2015 (in dollars per share) | 11.60 | $ 11.65 |
Exercisable at December 31, 2015 (in dollars per share) | 11.60 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ 11.58 |  |
Stock options, Outstanding, Weighted Average Remaining Contractual Life | 2 years 14 days |  |
Stock options, Exercisable, Weighted Average Remaining Contractual Life | 2 years |  |
Stock options, Outstanding, Aggregate Intrinsic Value | $ 123 |  |
Stock options, Exercisable, Aggregate Intrinsic Value | $ 122 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | 1,154 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term | 1 year 3 months |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $ 111 |  |
Stock options |  |  |
Number of Options |  |  |
Exercisable at December 31, 2015 (in shares) |  | 490 | 349
Weighted Average Exercise Price |  |  |
Exercisable at December 31, 2015 (in dollars per share) |  | $ 11.87 | $ 11.90
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] |  |  |
Stock options, Outstanding, Weighted Average Remaining Contractual Life |  | 2 years 8 months 19 days | 2 years 9 months 29 days
Stock options, Exercisable, Weighted Average Remaining Contractual Life |  | 1 year 9 months 3 days | 2 years 2 months 15 days
Stock options, Outstanding, Aggregate Intrinsic Value |  | $ 1,814 | $ 1,958
Stock options, Exercisable, Aggregate Intrinsic Value |  | $ 761 | $ 619

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 + Details
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