| **CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $)** | 12 Months Ended                                    |
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| **Statement of Stockholders' Equity [Abstract]**                           |                                               |   |   |
| Cash dividends on common stock (in dollars per share)                      | $ 0.29us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.18us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.10us-gaap_CommonStockDividendsPerShareCashPaid |

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3Reference 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
+ Details**Name:**us-gaap_CommonStockDividendsPerShareCashPaid**Namespace Prefix:**us-gaap_**Data Type:**num:perShareItemType**Balance Type:**na**Period Type:**duration |
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| - Details**Name:**us-gaap_StatementOfStockholdersEquityAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |