Stock-Based Compensation And Employee Benefit Plans (Stock Options Vesting Description) (Details)	12 Months Ended
	Mar. 31, 2018
Fifty Month Vesting With Twenty Four and Two Percent [Member]
Cliff Vesting Period	50 months
Thirty Five Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Period	35 months
Thirty Six Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Period	36 months
Vesting Year4 [Member] | Fifty Month Vesting With Twenty Four Percent [Member]
Cliff Vesting Period	38 months
Vesting Year4 [Member] | Fifty Month Vesting With Twenty Four and Two Percent [Member]
Cliff Vesting Percentage	2.00%
Vesting Year3 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%
Cliff Vesting Period	35 months
Vesting Year3 [Member] | Thirty Six Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%
Cliff Vesting Period	23 months
Vesting Year2 [Member] | Thirty Six Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%
Vesting Year1 [Member] | Fifty Month Vesting With Twenty Four Percent [Member]
Cliff Vesting Period	12 months
Vesting Year1 [Member] | Fifty Month Vesting With Twenty Four and Two Percent [Member]
Cliff Vesting Percentage	24.00%
Vesting Year1 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%
Cliff Vesting Period	11 months
Vesting Year1 [Member] | Thirty Six Month Vesting With Thirty Three Percent [Member]
Cliff Vesting Percentage	33.33333%