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Stockholders' Equity - Stock Repurchase Program and Cash Dividends (Details) |  |  |  |  |  |  |  |  |  | 3 Months Ended |  |  |  |
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Feb. 13, 2018 $ / shares | Dec. 12, 2017 $ / shares | Sep. 12, 2017 $ / shares | Jun. 13, 2017 $ / shares | Mar. 14, 2017 $ / shares | Dec. 13, 2016 $ / shares | Sep. 13, 2016 $ / shares | Jun. 14, 2016 $ / shares | Mar. 15, 2016 $ / shares | Oct. 28, 2017 USD ($) shares | Jul. 29, 2017 USD ($) shares | Mar. 16, 2018 USD ($) | Feb. 03, 2018 USD ($) item | Apr. 10, 2017 USD ($) | Jan. 28, 2017 item
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  | $ 25,000,000 |  |  |
Aggregate value of stock repurchases that cause program to expire |  |  |  |  |  |  |  |  |  | $ 25,000,000 | $ 25,000,000 |  |  |  |
Cash dividends declared per share | $ / shares | $ 0.08 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of quarters dividends paid | item |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  | 4
Cash dividend paid per share | $ / shares |  | $ 0.08 | $ 0.08 | $ 0.08 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 |  |  |  |  |  |
Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period Shares | shares |  |  |  |  |  |  |  |  |  | 1,201,000 | 1,201,000 |  |  |  |
Additional shares which could be repurchased |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Stock Repurchase Program | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000 |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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