Stockholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions |
|
1 Months Ended |
9 Months Ended |
Apr. 15, 2016 |
Feb. 29, 2016 |
Sep. 30, 2016 |
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Shares withheld for taxes (in shares) |
|
|
0.2
|
| Shares withheld for taxes, value |
|
|
$ 700,000
|
| Stock repurchase program, authorized amount |
|
$ 200,000,000
|
|
| Stock repurchase program, period in force |
|
18 months
|
|
| Stock repurchased during period |
|
|
$ 0
|
| Weighted Average |
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Price per share issued (in USD per share) |
|
|
$ 12.47
|
| Underwritten Public Offering |
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Issuance of common shares (in shares) |
34.5
|
|
|
| Gross proceeds from common stock offering |
$ 384,700,000
|
|
|
| Net proceeds from common stock offering |
$ 368,900,000
|
|
|
| Underwritten Public Offering | Weighted Average |
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Price per share issued (in USD per share) |
$ 11.15
|
|
|
| ATM Program |
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Issuance of common shares (in shares) |
|
|
6.3
|
| Gross proceeds from common stock offering |
|
|
$ 79,000,000
|
| Net proceeds from common stock offering |
|
|
77,700,000
|
| Payment of commissions and other issuance costs |
|
|
1,300,000
|
| Gross proceeds capacity remaining |
|
|
$ 24,500,000
|
| Equity Option | Over-Allotment Option |
|
|
|
| Subsidiary, Sale of Stock [Line Items] |
|
|
|
| Issuance of common shares (in shares) |
4.5
|
|
|