Stockholders' Equity and Partners' Capital - Narrative (Details) - USD ($)
|
1 Months Ended |
3 Months Ended |
6 Months Ended |
32 Months Ended |
|
May 31, 2019 |
May 31, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Dec. 31, 2018 |
| Class Of Stock [Line Items] |
|
|
|
|
|
|
|
|
| Shares withheld for taxes |
|
|
|
|
34,000
|
|
|
|
| Shares withheld for taxes, value |
|
|
|
|
$ 1,400,000
|
|
|
|
| Forward sale agreements, shares of common stock |
11,500,000
|
|
|
|
|
|
|
|
| Forward sale agreements, price per share |
$ 41.00
|
|
|
|
|
|
|
|
| Forward sale agreements, initial price per share |
$ 39.36
|
|
|
|
|
|
|
|
| Gross proceeds from issuance of common stock |
|
|
|
|
$ 162,270,000
|
$ 0
|
|
|
| Preferred stock, shares outstanding |
|
|
6,900,000
|
|
6,900,000
|
|
6,900,000
|
6,900,000
|
| Dividend rate |
|
|
|
|
6.00%
|
|
|
|
| Liquidation value (in USD per share) |
|
|
$ 25.00
|
|
$ 25.00
|
|
$ 25.00
|
|
| Dividend rate, quarterly basis (in USD per share) |
|
|
|
|
0.375
|
|
|
|
| Dividend rate, annual basis (in USD per share) |
|
|
|
|
$ 1.50
|
|
|
|
| Less: dividends paid to preferred stockholders |
|
|
$ 2,588,000
|
$ 2,588,000
|
$ 5,176,000
|
$ 5,176,000
|
|
|
| Common stock, par value per share (in USD per share) |
|
|
$ 0.05
|
|
$ 0.05
|
|
$ 0.05
|
$ 0.05
|
| May 2018 |
|
|
|
|
|
|
|
|
| Class Of Stock [Line Items] |
|
|
|
|
|
|
|
|
| Stock repurchase program, remaining authorized repurchase amount |
|
$ 250,000,000.0
|
$ 250,000,000.0
|
|
$ 250,000,000.0
|
|
$ 250,000,000.0
|
|
| Stock repurchase program, period in force |
|
18 months
|
|
|
|
|
|
|
| Stock repurchase program, repurchase of common shares (in shares) |
|
|
|
|
0
|
|
|
|
| Forward Sale Agreements |
|
|
|
|
|
|
|
|
| Class Of Stock [Line Items] |
|
|
|
|
|
|
|
|
| Issuance of common shares (in shares) |
|
|
|
|
1,900,000
|
|
|
|
| Gross proceeds from issuance of common stock |
|
|
|
|
$ 76,000,000.0
|
|
|
|
| ATM Program, November 2016 |
|
|
|
|
|
|
|
|
| Class Of Stock [Line Items] |
|
|
|
|
|
|
|
|
| Issuance of common shares (in shares) |
|
|
|
|
2,300,000
|
|
2,400,000
|
|
| Gross proceeds from issuance of common stock |
|
|
|
|
$ 91,400,000
|
|
|
|
| Common stock, par value per share (in USD per share) |
|
|
$ 0.05
|
|
$ 0.05
|
|
$ 0.05
|
|
| Common stock authorized |
|
|
|
|
$ 500,000,000.0
|
|
|
|
| Gross proceeds capacity remaining |
|
|
$ 404,900,000
|
|
$ 404,900,000
|
|
$ 404,900,000
|
|
| Share issued during the period (in USD per share) |
|
|
|
|
$ 39.19
|
|
|
|
| ATM Program, Forward Sales |
|
|
|
|
|
|
|
|
| Class Of Stock [Line Items] |
|
|
|
|
|
|
|
|
| Issuance of common shares (in shares) |
|
|
|
|
1,800,000
|
|
|
|