Stockholders' Equity - Options Outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Weighted Average Remaining Contractual Life	2 years 8 months 12 days
$ 1.68 - $ 7.60
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 1.68
Range of Exercise Price, maximum (USD per share)	$ 7.60
Options Outstanding	540
Weighted Average Remaining Contractual Life	3 years 25 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 6.77
Options Exercisable	462
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 6.71
$ 7.61 - $ 7.67
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 7.61
Range of Exercise Price, maximum (USD per share)	$ 7.67
Options Outstanding	650
Weighted Average Remaining Contractual Life	2 years 4 months 4 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 7.67
Options Exercisable	650
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 7.67
$ 7.68 - $ 11.86
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 7.68
Range of Exercise Price, maximum (USD per share)	$ 11.86
Options Outstanding	430
Weighted Average Remaining Contractual Life	3 years 3 months 17 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 10.49
Options Exercisable	419
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 10.47
$ 11.87 - $ 14.20
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 11.87
Range of Exercise Price, maximum (USD per share)	$ 14.20
Options Outstanding	491
Weighted Average Remaining Contractual Life	2 years 4 months 18 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 12.87
Options Exercisable	483
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 12.88
$ 14.41 - $ 23.32
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 14.21
Range of Exercise Price, maximum (USD per share)	$ 23.32
Options Outstanding	298
Weighted Average Remaining Contractual Life	1 year 5 months 18 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 15.96
Options Exercisable	298
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 15.96
$ 1.68 - $ 23.32
Weighted Average Remaining Contractual Life and Weighted Average Per Share Exercise Price of Options Outstanding and Options Exercisable
Range of Exercise Price, minimum (USD per share)	$ 1.68
Range of Exercise Price, maximum (USD per share)	$ 23.32
Options Outstanding	2,409
Weighted Average Remaining Contractual Life	2 years 6 months 25 days
Weighted Average Exercise Price, Options Outstanding (USD per share)	$ 10.06
Options Exercisable	2,312
Weighted Average Exercise Price, Options Exercisable (USD per share)	$ 10.14