Stockholders' Equity (Details) - USD ($)			6 Months Ended
	Jan. 29, 2018	Aug. 07, 2017	Jun. 30, 2018
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	637,115
Grants in period (in shares)	295,514
Annual vesting after initial cliff			33.33%
Performance period two			3 years
Target percentage			100.00%
Period in force		2 years
Authorized amount		$ 100,000,000.0
Remaining authorized repurchase amount			$ 100,000,000