Equity - Share Repurchase Program (Details) - USD ($)	3 Months Ended				6 Months Ended	14 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2019	May 06, 2019	May 03, 2018
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock	0	199,083	69,931	230,436
The 2018 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Value of stock authorized for repurchase under stock repurchase program (up to)								$ 200,000,000.0
Repurchase of common stock					0
Repurchases of common stock under the Share Repurchase Program (shares)						800,000
Repurchases of common stock under the share repurchase program weighted average price per share (USD per share)						$ 6.95
Repurchases of common stock under the Share Repurchase Program						$ 5,600,000
The 2019 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Value of stock authorized for repurchase under stock repurchase program (up to)							$ 200,000,000.0