Shareholders' Equity - Declared Quarterly Cash Dividends on Common Stock (Details) - $ / shares |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Jan. 31, 2018 |
Oct. 25, 2017 |
Jul. 26, 2017 |
Apr. 26, 2017 |
Jan. 26, 2017 |
Mar. 31, 2018 |
Dec. 31, 2017 |
|
| Subsequent Event [Line Items] | |||||||
| Dividends per share (in dollars per share) | $ 0.12 | $ 0.12 | $ 0.075 | $ 0.075 | $ 0.39000000 | ||
| Subsequent Event | |||||||
| Subsequent Event [Line Items] | |||||||
| Dividends per share (in dollars per share) | $ 0.120 | $ 0.12 |
| X | ||||||||||
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
|
| X | ||||||||||
- Details
|