Significant Accounting Policies - Schedule of Basic Weighted Average Shares Reconciles to Diluted Weighted Average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Basic weighted average common shares outstanding (in shares)	75,779	75,698	75,460	75,442	76,128	76,562	76,539	76,419	75,594	76,412	76,232
Dilutive effect of stock options, restricted stock and performance share units (in shares)									860	1,151	1,101
Diluted weighted average common shares outstanding (in shares)	76,570	76,577	76,387	76,284	77,100	77,709	77,704	77,739	76,454	77,563	77,333