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Significant Accounting Policies - Schedule of Earnings Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Accounting Policies [Abstract]    
Weighted average common shares outstanding—basic (in shares) 35,559 37,729
Dilutive effect of common stock options and awards (in shares) 0 0
Weighted average common shares outstanding—diluted (in shares) 35,559 37,729