Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017
Stockholders' Equity
Common Stock, Shares, Outstanding	107,231,155				107,231,155
Dividends declared and paid
Cash dividend declared per share (in dollars per share)	$ 0.09	$ 0.19	$ 0.19	$ 0.19
Total Dividends	$ 9,651	$ 20,374	$ 20,374	$ 20,374