Stockholders' Equity - Reconciliation of Number of Shares of Common Stock (Details) - shares	5 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Stockholders Equity Note [Abstract]
Common stock, beginning of period		42,694,000	44,251,000
Shares of common stock issued upon lapse of restricted stock units ("RSUs")		304,000	329,000
Common stock retired	(937,054)	(990,000)	(1,412,000)
Common stock, end of period	42,008,000	42,008,000	43,168,000