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Inome Taxes (Income Tax Provision) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ (395) | $ (7) | $ 97
State |  |  |  |  |  |  |  |  | 256 | 588 | 551
Foreign |  |  |  |  |  |  |  |  | 185 | 112 | 71
Total current income tax provision |  |  |  |  |  |  |  |  | 46 | 693 | 719
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 59,837 | 1,506 | 95
State |  |  |  |  |  |  |  |  | 6,664 | (1,095) | (854)
Foreign |  |  |  |  |  |  |  |  | (253) | (1,230) | (807)
Total deferred tax (benefit) provision |  |  |  |  |  |  |  |  | 66,248 | (819) | (1,566)
Income tax (benefit) provision | $ 142 | $ 70,842 | $ (3,453) | $ (1,236) | $ (178) | $ 30 | $ (15) | $ 37 | $ 66,294 | $ (126) | $ (847)

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