Equity-Based Compensation Grant Options and RSU's (Details) - shares shares in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	166	340
Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	166
Two Thousand Ten, Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	4
Shares granted	16
Two Thousand Ten, Equity Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	4
Two Thousand Ten, Equity Plan [Member] | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0
Two Thousand Ten, Equity Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	8	16
Two Thousand Ten, Equity Plan [Member] | Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	8
Two Thousand Fourteen, Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	184
Shares granted	0
Two Thousand Fourteen, Equity Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	90	8
Two Thousand Fourteen, Equity Plan [Member] | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	94
Two Thousand Fourteen, Equity Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0
Two Thousand Fourteen, Equity Plan [Member] | Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0
Two Thousand Eighteen, Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	144
Shares granted	0
Two Thousand Eighteen, Equity Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	72
Two Thousand Eighteen, Equity Plan [Member] | Employee Performance Based Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	72
Two Thousand Eighteen, Equity Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0
Two Thousand Eighteen, Equity Plan [Member] | Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0