XML 109 R97.htm IDEA: XBRL DOCUMENT
v3.19.1

Stockholders' Equity - Cash Dividends Declared - Preferred Stock (Details) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018
Series B Preferred Stock |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Cash Dividend Per Share (in dollars per share) | $ 0.484375 | $ 0.484375 | $ 0.484375 | $ 0.484375 | $ 0.484375
Series C Preferred Stock |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Cash Dividend Per Share (in dollars per share) | 0.4921875 | 0.4921875 | 0.4921875 | 0.4921875 | 0.4921875
Series D Preferred Stock |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |
Cash Dividend Per Share (in dollars per share) | $ 0.5 | $ 0.5 | $ 0.5 | $ 0.5 | $ 0.50

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DividendsPayableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends paid during the period for each share of preferred stock outstanding. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendsPerShareCashPaid
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |