Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	New Accounting Pronouncement, Early Adoption, Effect [Member] Additional Paid-In Capital	New Accounting Pronouncement, Early Adoption, Effect [Member] Retained Deficit
Balance (in shares) at Mar. 31, 2014		45,207
Balance at Mar. 31, 2014	$ 221,884,000	$ 465,000	$ 465,027,000	$ (231,738,000)	$ 18,184,000	$ (30,054,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(14,143,000)	0	0	(14,143,000)	0	0
Other comprehensive income (loss)	(46,980,000)	0	0	0	(46,980,000)	0
Issuance of restricted shares	(615,000)	$ 0	(8,238,000)	0	0	7,623,000
Issuance of restricted shares (in shares)		239
Stock-based compensation	4,512,000		4,512,000
Exercise of stock options	24,000	$ 0	(110,000)	0	0	134,000
Exercise of stock options (in shares)		6
Balance (in shares) at Mar. 31, 2015		45,452
Balance at Mar. 31, 2015	164,682,000	$ 465,000	461,191,000	(245,881,000)	(28,796,000)	(22,297,000)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(53,629,000)	0	0	(53,629,000)	0	0
Other comprehensive income (loss)	(2,629,000)	0	0	0	(2,629,000)	0
Issuance of restricted shares	(717,000)	$ 0	(13,144,000)	0	0	12,427,000
Issuance of restricted shares (in shares)		445
Stock-based compensation	4,774,000		4,774,000
Exercise of stock options	0	$ 0	0	0	0	0
Exercise of stock options (in shares)		0
Balance (in shares) at Mar. 31, 2016		45,897
Balance at Mar. 31, 2016	112,481,000	$ 465,000	452,821,000	(299,510,000)	(31,425,000)	(9,870,000)
Increase (Decrease) in Stockholders' Equity
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]								$ 130,000
Net income (loss)	47,989,000	0	0		0	0
Other comprehensive income (loss)	(10,387,000)	0	0	0	(10,387,000)	0
Issuance of restricted shares	(1,261,000)	$ 0	(10,860,000)	0	0	9,599,000
Issuance of restricted shares (in shares)		588
Stock-based compensation	4,720,000		4,720,000
Exercise of stock options	1,133,000	$ 2,000	860,000	0	0	271,000
Exercise of stock options (in shares)		204
Balance (in shares) at Mar. 31, 2017		46,689
Balance at Mar. 31, 2017	$ 154,675,000	$ 467,000	$ 447,671,000	$ (251,651,000)	$ (41,812,000)	$ 0
Increase (Decrease) in Stockholders' Equity
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member]							$ 130,000	$ (130,000)