Stockholders' Equity - Schedule of Shares Repurchased (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	May 06, 2019	Dec. 12, 2018	Sep. 05, 2017
Equity [Line Items]
Shares repurchased during period	$ 25,708,000	$ 14,107,000	$ 10,117,000	$ 8,370,000	$ 2,746,000
May Two Thousand Nineteen Share Repurchase Program [Member]
Equity [Line Items]
Shares repurchased (in shares)						1,302,401	0
Shares repurchased during period						$ 35,419,000
Shares repurchased during period (in dollars per share)						$ 27.20
May Two Thousand Nineteen Share Repurchase Program [Member] \| Maximum [Member]
Equity [Line Items]
Amount of shares authorized to repurchase								$ 40,000,000
December Two Thousand Eighteen Share Repurchase Program [Member]
Equity [Line Items]
Shares repurchased (in shares)						468,108	0
Shares repurchased during period						$ 14,513,000
Shares repurchased during period (in dollars per share)						$ 31.00
December Two Thousand Eighteen Share Repurchase Program [Member] \| Maximum [Member]
Equity [Line Items]
Amount of shares authorized to repurchase									$ 20,000,000
September Two Thousand Seventeen Share Repurchase Program [Member]
Equity [Line Items]
Shares repurchased (in shares)						0	342,749
Shares repurchased during period						$ 11,116,000
Shares repurchased during period (in dollars per share)						$ 32.43
September Two Thousand Seventeen Share Repurchase Program [Member] \| Maximum [Member]
Equity [Line Items]
Amount of shares authorized to repurchase										$ 20,000,000