Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Mar. 31, 2017		46,689
Balance at Mar. 31, 2017	$ 155,569	$ 467	$ 447,671	$ (250,757)	$ (41,812)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	254,127	0	0		0
Other comprehensive income (loss)	39,014	0	0	0	39,014
Issuance of shares, net of tax withholdings	8,142	$ 99	8,043	0	0
Issuance of restricted shares (in shares)		9,952
Payments of Ordinary Dividends, Common Stock	0
Stock-based compensation	7,657		7,657
Offering Fees			(634)
Balance (in shares) at Mar. 31, 2018		56,641
Balance at Mar. 31, 2018	463,875	$ 566	462,737	3,370	(2,798)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	206,587	0	0		0
Other comprehensive income (loss)	(27,926)	0	0	0	(27,926)
Issuance of shares, net of tax withholdings	(10,225)	$ 12	(10,237)	0	0
Issuance of restricted shares (in shares)		1,181
Payments of Ordinary Dividends, Common Stock	(5,762)
Stock-based compensation	12,866		12,866
Balance (in shares) at Mar. 31, 2019		57,822
Balance at Mar. 31, 2019	639,415	$ 578	465,366	204,195	(30,724)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	41,381	0	0		0
Other comprehensive income (loss)	(36,858)	0	0	0	(36,858)
Issuance of shares, net of tax withholdings	(2,957)	$ 5	(2,962)	0	0
Issuance of restricted shares (in shares)		452
Payments of Ordinary Dividends, Common Stock	(5,803)
Stock-based compensation	12,084		12,084
Balance (in shares) at Mar. 31, 2020		58,274
Balance at Mar. 31, 2020	$ 647,262	$ 583	$ 474,488	$ 239,773	$ (67,582)