XML 97 R83.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsequent Events (Details) |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2018 USD ($) | Feb. 15, 2018 USD ($) $ / shares | Feb. 01, 2017 | Dec. 31, 2017 $ / shares | Sep. 30, 2017 $ / shares | Jun. 30, 2017 $ / shares | Mar. 31, 2017 $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 $ / shares | Dec. 31, 2015 $ / shares | Jun. 01, 2017 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per common share (in $ per share) | $ / shares |  |  |  | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 1.80 | $ 1.8 | $ 1.8 |
Cash dividends declared per preferred share (in $ per share) | $ / shares |  |  |  | $ 1.8125 | $ 1.8125 | $ 1.8125 | $ 1.8125 | $ 7.25 | $ 0 | $ 0 |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per common share (in $ per share) | $ / shares |  | $ 0.45 |  |  |  |  |  |  |  |  |
Cash dividends declared per preferred share (in $ per share) | $ / shares |  | $ 1.8125 |  |  |  |  |  |  |  |  |
Term Loan | Additional Term Loan 2018 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 105,000,000.0 |  |  |  |  |  |  |  |  |
Covenant terms, leverage ratio |  | 2.5 |  |  |  |  |  |  |  |  |
Covenant terms, amount drawn down |  | $ 30,000,000 |  |  |  |  |  |  |  |  |
Term Loan | Credit Facility 2017 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 260,000,000.0
Revolving Credit Facility | Credit Facility 2017 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 100,000,000.0
Convertible preferred stock |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock dividend rate |  |  | 7.25% |  |  |  |  |  |  |  |
Forecast |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase price, cash | $ 129,500,000 |  |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) | Credit Facility 2017 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  |  |  |  |  |  |  | 3.75% |  |  |
London Interbank Offered Rate (LIBOR) | Credit Facility 2017 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reduction in rate |  | 1.25% |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  | 2.50% |  |  |  |  |  |  |  |  |
Minimum | London Interbank Offered Rate (LIBOR) | Credit Facility 2017 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  |  |  |  |  |  |  | 3.50% |  |  |
Minimum | London Interbank Offered Rate (LIBOR) | Credit Facility 2017 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  | 2.25% |  |  |  |  |  |  |  |  |
Maximum | London Interbank Offered Rate (LIBOR) | Credit Facility 2017 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  |  |  |  |  |  |  | 3.75% |  |  |
Maximum | London Interbank Offered Rate (LIBOR) | Credit Facility 2017 | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable interest rate |  | 2.50% |  |  |  |  |  |  |  |  |

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