Stockholders' Equity - Summary of Activity of Shares Repurchases (Details) - USD ($)	1 Months Ended	3 Months Ended									12 Months Ended
	Sep. 30, 2019	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, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 01, 2018	Nov. 30, 2017	Nov. 17, 2017
Equity [Abstract]
Shares Repurchased (in shares)	2,094,196	425,078	50,721	0	532,412	916,083	0	722,941	2,807,393	586,231	6,040,859	5,032,648	586,231
Average Price Paid Per Share (in dollars per share)		$ 52.21	$ 55.16	$ 0	$ 51.64	$ 49.11	$ 0	$ 29.15	$ 24.43	$ 17.57	$ 32.68	$ 28.80	$ 17.57
Value of shares repurchased during period, including broker fees		$ (22,202,000)	$ (2,798,000)	$ 0	$ (27,500,000)	$ (45,000,000)	$ 0	$ (21,113,000)	$ (68,586,000)	$ (10,301,000)	$ (197,500,000)	$ (145,000,000)	$ (10,301,000)
Value of Shares Repurchased	$ 124,500,000										176,985,000	134,647,000	10,301,000
New Authorization														$ 200,000,000	$ 100,000,000	$ 100,000,000
Remaining Amount Authorized		$ 102,500,000				$ 155,000,000				$ 89,699,000	$ 102,500,000	$ 155,000,000	$ 89,699,000