Stockholders' Equity - Reconciliation of total stockholders' equity (Details) - USD ($)
$ / shares in Units, $ in Thousands |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Net income |
$ 33,134
|
$ 50,778
|
| Common Stock [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
1,015
|
|
| Issuance of common stock |
142
|
|
| Common stock redemptions |
0
|
|
| Stock-based compensation |
3
|
|
| Net income |
0
|
|
| Reclassification of loss on forward starting interest rate swaps |
0
|
|
| Dividends to common stockholders ($0.90 per share) |
0
|
|
| Balance at September 30, 2016 |
1,160
|
|
| Additional Paid-In Capital [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
2,461,376
|
|
| Issuance of common stock |
450,204
|
|
| Common stock redemptions |
(410)
|
|
| Stock-based compensation |
5,646
|
|
| Net income |
0
|
|
| Reclassification of loss on forward starting interest rate swaps |
0
|
|
| Dividends to common stockholders ($0.90 per share) |
0
|
|
| Balance at September 30, 2016 |
2,916,816
|
|
| Accumulated Other Comprehensive Loss [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
(1,569)
|
|
| Issuance of common stock |
0
|
|
| Common stock redemptions |
0
|
|
| Stock-based compensation |
0
|
|
| Net income |
0
|
|
| Reclassification of loss on forward starting interest rate swaps |
126
|
|
| Dividends to common stockholders ($0.90 per share) |
0
|
|
| Balance at September 30, 2016 |
(1,443)
|
|
| Cumulative Net Income Attributable to Common Stockholders [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
909,685
|
|
| Issuance of common stock |
0
|
|
| Common stock redemptions |
0
|
|
| Stock-based compensation |
0
|
|
| Net income |
33,134
|
|
| Reclassification of loss on forward starting interest rate swaps |
0
|
|
| Dividends to common stockholders ($0.90 per share) |
0
|
|
| Balance at September 30, 2016 |
942,819
|
|
| Cumulative Dividends [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
(2,127,760)
|
|
| Issuance of common stock |
0
|
|
| Common stock redemptions |
0
|
|
| Stock-based compensation |
0
|
|
| Net income |
0
|
|
| Reclassification of loss on forward starting interest rate swaps |
0
|
|
| Dividends to common stockholders ($0.90 per share) |
(96,998)
|
|
| Balance at September 30, 2016 |
$ (2,224,758)
|
|
| Dividends per share paid to common stockholders (in dollars per share) |
$ 0.90
|
|
| Total Stockholders' Equity [Member] |
|
|
| Increase (Decrease) in Stockholders' Equity [Rollforward] |
|
|
| Balance at December 31, 2015 |
$ 1,242,747
|
|
| Issuance of common stock |
450,346
|
|
| Common stock redemptions |
(410)
|
|
| Stock-based compensation |
5,649
|
|
| Net income |
33,134
|
|
| Reclassification of loss on forward starting interest rate swaps |
126
|
|
| Dividends to common stockholders ($0.90 per share) |
(96,998)
|
|
| Balance at September 30, 2016 |
$ 1,634,594
|
|