Senior Notes and Unsecured Revolving Credit Facility - Schedule of Notes Payable (Details) - USD ($) $ in Thousands	Jun. 30, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
7.25% Senior Notes due 2022, net	$ 318,121	[1]	$ 0
Senior unsecured revolving credit facility	0		118,000
Total Notes Payable	$ 318,121		$ 118,000

[1] (1) The carrying value for the Senior Notes, as presented, is net of the unamortized discount of $2.5 million, unamortized premium of $2.0 million, and $6.4 million of debt issuance costs. The unamortized discount, unamortized premium and debt issuance costs are not factored into the estimated fair value.