Stock-Based Compensation And Employee Benefit Plans (Restricted Stock Units Vesting Description) (Details)	12 Months Ended
	Mar. 31, 2017
One Year Vesting With One Hundred Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	1 year
Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	35 months
Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	3 years
Three Year Vesting With Sixty Seven And Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	3 years
Three Year Vesting With Twenty, Twenty Five, and Thirty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	3 years
Forty Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	40 months
Forty One Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	41 months
Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	4 years
Forty Two Month Vesting With Forty, Thirty Five, Twenty and Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	51 months
Vesting Year1 [Member] | One Year Vesting With One Hundred Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	100.00%
Vesting Year1 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	11 months
Cliff Vesting Percentage	33.33333%
Vesting Year1 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year1 [Member] | Three Year Vesting With Twenty, Twenty Five, and Thirty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	35.00%
Vesting Year1 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year2 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	23 months
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Three Year Vesting With Sixty Seven And Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	66.66667%
Vesting Year2 [Member] | Three Year Vesting With Twenty, Twenty Five, and Thirty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	20.00%
Vesting Year2 [Member] | Forty Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	16 months
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Forty One Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	17 months
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year2 [Member] | Forty Two Month Vesting With Forty, Thirty Five, Twenty and Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	18 months
Cliff Vesting Percentage	35.00%
Vesting Year3 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	35 months
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Three Year Vesting With Sixty Seven And Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Three Year Vesting With Twenty, Twenty Five, and Thirty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	20.00%
Vesting Year3 [Member] | Forty Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	28 months
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Forty One Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	28 months
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year3 [Member] | Forty Two Month Vesting With Forty, Thirty Five, Twenty and Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	30 months
Cliff Vesting Percentage	20.00%
Vesting Year4 [Member] | Forty Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	40 months
Cliff Vesting Percentage	33.33333%
Vesting Year4 [Member] | Forty One Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	41 months
Cliff Vesting Percentage	33.33333%
Vesting Year4 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year4 [Member] | Forty Two Month Vesting With Forty, Thirty Five, Twenty and Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	42 months
Cliff Vesting Percentage	5.00%
Vesting 6 Months [Member] | Three Year Vesting With Twenty, Twenty Five, and Thirty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting 6 Months [Member] | Forty Two Month Vesting With Forty, Thirty Five, Twenty and Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	40.00%