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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive (Loss) Income
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Mar. 31, 2018 |  | 30,447,000 |  |  |
Beginning balance at Mar. 31, 2018 | $ 940,779 | $ 304 | $ 167,587 | $ 785,871 | $ (12,983)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 2,000 |  |  |
Stock-based compensation | 3,526 |  | 3,526 |  |
Shares issued upon vesting (in shares) |  | 6,000 |  |  |
Shares issued upon vesting | 0 |  |  |  |
Shares withheld for taxes | (328) |  | (328) |  |
Repurchases of common stock (in shares) |  | (86,000) |  |  |
Repurchases of common stock | (9,999) |  |  | (9,999) |
Net income (loss) | (30,407) |  |  | (30,407) |
Total other comprehensive loss | (2,140) |  |  |  | (2,140)
Ending balance (in shares) at Jun. 30, 2018 |  | 30,369,000 |  |  |
Ending balance at Jun. 30, 2018 | 902,151 | $ 304 | 170,785 | 746,185 | (15,123)
Beginning balance (in shares) at Mar. 31, 2018 |  | 30,447,000 |  |  |
Beginning balance at Mar. 31, 2018 | 940,779 | $ 304 | 167,587 | 785,871 | (12,983)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income (loss) | 240,339 |  |  |  |
Total other comprehensive loss | (9,545) |  |  |  |
Ending balance (in shares) at Dec. 31, 2018 |  | 29,128,000 |  |  |
Ending balance at Dec. 31, 2018 | 1,017,881 | $ 291 | 174,821 | 865,297 | (22,528)
Beginning balance (in shares) at Jun. 30, 2018 |  | 30,369,000 |  |  |
Beginning balance at Jun. 30, 2018 | 902,151 | $ 304 | 170,785 | 746,185 | (15,123)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 2,000 |  |  |
Stock-based compensation | 3,926 |  | 3,926 |  |
Shares issued upon vesting (in shares) |  | 65,000 |  |  |
Shares issued upon vesting | 475 | $ 1 | 474 |  |
Shares withheld for taxes | (4,091) |  | (4,091) |  |
Repurchases of common stock (in shares) |  | (1,065,000) |  |  |
Repurchases of common stock | (124,736) | $ (11) |  | (124,725) |
Net income (loss) | 74,372 |  |  | 74,372 |
Total other comprehensive loss | (5,058) |  |  |  | (5,058)
Ending balance (in shares) at Sep. 30, 2018 |  | 29,371,000 |  |  |
Ending balance at Sep. 30, 2018 | 846,787 | $ 294 | 171,094 | 695,580 | (20,181)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 2,000 |  |  |
Stock-based compensation | 4,037 |  | 4,037 |  |
Shares issued upon vesting (in shares) |  | 5,000 |  |  |
Shares issued upon vesting | 0 |  |  |  |
Shares withheld for taxes | (310) |  | (310) |  |
Repurchases of common stock (in shares) |  | (250,000) |  |  |
Repurchases of common stock | (26,660) | $ (3) |  | (26,657) |
Net income (loss) | 196,374 |  |  | 196,374 |
Total other comprehensive loss | (2,347) |  |  |  | (2,347)
Ending balance (in shares) at Dec. 31, 2018 |  | 29,128,000 |  |  |
Ending balance at Dec. 31, 2018 | 1,017,881 | $ 291 | 174,821 | 865,297 | (22,528)
Beginning balance (in shares) at Mar. 31, 2019 |  | 29,141,000 |  |  |
Beginning balance at Mar. 31, 2019 | 1,045,130 | $ 291 | 178,227 | 889,266 | (22,654)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 1,000 |  |  |
Stock-based compensation | 3,424 |  | 3,424 |  |
Shares issued upon vesting (in shares) |  | 4,000 |  |  |
Shares issued upon vesting | 0 |  |  |  |
Exercise of stock options (in shares) |  | 46,000 |  |  |
Exercise of stock options | 2,773 | $ 1 | 2,772 |  |
Shares withheld for taxes | (374) |  | (374) |  |
Repurchases of common stock (in shares) |  | (227,000) |  |  |
Repurchases of common stock | (35,005) | $ (2) |  | (35,003) |
Net income (loss) | (19,351) |  |  | (19,351) |
Total other comprehensive loss | (249) |  |  |  | (249)
Ending balance (in shares) at Jun. 30, 2019 |  | 28,965,000 |  |  |
Ending balance at Jun. 30, 2019 | 995,279 | $ 290 | 184,049 | 833,843 | (22,903)
Beginning balance (in shares) at Mar. 31, 2019 |  | 29,141,000 |  |  |
Beginning balance at Mar. 31, 2019 | $ 1,045,130 | $ 291 | 178,227 | 889,266 | (22,654)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Repurchases of common stock (in shares) | (1,296,201) |  |  |  |
Repurchases of common stock | $ (190,405) |  |  |  |
Net income (loss) | 260,052 |  |  |  |
Total other comprehensive loss | (449) |  |  |  |
Ending balance (in shares) at Dec. 31, 2019 |  | 27,982,000 |  |  |
Ending balance at Dec. 31, 2019 | 1,123,747 | $ 280 | 188,713 | 957,857 | (23,103)
Beginning balance (in shares) at Jun. 30, 2019 |  | 28,965,000 |  |  |
Beginning balance at Jun. 30, 2019 | 995,279 | $ 290 | 184,049 | 833,843 | (22,903)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 3,000 |  |  |
Stock-based compensation | 5,075 |  | 5,075 |  |
Shares issued upon vesting (in shares) |  | 73,000 |  |  |
Shares issued upon vesting | 618 | $ 1 | 617 |  |
Exercise of stock options (in shares) |  | 3,000 |  |  |
Exercise of stock options | 186 |  | 186 |  |
Shares withheld for taxes | (5,370) |  | (5,370) |  |
Repurchases of common stock (in shares) |  | (1,069,000) |  |  |
Repurchases of common stock | (155,400) | $ (11) |  | (155,389) |
Net income (loss) | 77,810 |  |  | 77,810 |
Total other comprehensive loss | (1,894) |  |  |  | (1,894)
Ending balance (in shares) at Sep. 30, 2019 |  | 27,975,000 |  |  |
Ending balance at Sep. 30, 2019 | 916,304 | $ 280 | 184,557 | 756,264 | (24,797)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation (in shares) |  | 1,000 |  |  |
Stock-based compensation | 4,221 |  | 4,221 |  |
Shares issued upon vesting (in shares) |  | 3,000 |  |  |
Shares issued upon vesting | 0 |  |  |  |
Exercise of stock options (in shares) |  | 3,000 |  |  |
Exercise of stock options | 186 |  | 186 |  |
Shares withheld for taxes | (251) |  | (251) |  |
Net income (loss) | 201,593 |  |  | 201,593 |
Total other comprehensive loss | 1,694 |  |  |  | 1,694
Ending balance (in shares) at Dec. 31, 2019 |  | 27,982,000 |  |  |
Ending balance at Dec. 31, 2019 | $ 1,123,747 | $ 280 | $ 188,713 | $ 957,857 | $ (23,103)

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant