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Debt - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 06, 2020 | Aug. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Feb. 28, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Equipment loans reclassified to liabilities held-for-sale |  |  | $ 1,000,000.0 |  | $ 1,000,000.0 |  | $ 200,000 |
Current maturities of long-term debt |  |  | 713,350,000 |  | 713,350,000 |  | 19,106,000 |
Debt issuance costs, line of credit arrangements, net |  |  | 2,100,000 |  | 2,100,000 |  | 3,000,000.0 |
Capitalized interest costs |  |  | 100,000 | $ 300,000 | 200,000 | $ 1,200,000 |  |
Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repayments of debt | $ 700,000,000 |  |  |  |  |  |  |
Interest Rate Swap |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 700,000,000.0
Derivative, fixed interest rate |  |  |  |  |  |  |  | 2.4575%
Life Sciences | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Net proceeds | 757,200,000 |  |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Cash proceeds from sale |  | $ 675,000,000.0 |  |  |  |  |  |
Debt issuance costs |  |  | 400,000 |  | 400,000 |  |  |
Unamortized debt issuance cost, written-off |  |  |  |  | 1,500,000 |  |  |
Senior Secured Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Borrowings |  |  | 545,000,000.0 |  | 545,000,000.0 |  |  |
Current maturities of long-term debt |  |  | $ 474,300,000 |  | $ 474,300,000 |  |  |
Debt instrument, LIBOR floor rate |  |  | 0.75% |  | 0.75% |  |  |
Interest rate during period |  |  |  |  | 6.50% |  |  |
Senior debt |  |  | $ 522,000,000 |  | $ 522,000,000 |  | 526,313,000 |
Senior Secured Term Loan | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  | 5.75% |  |  |
Incremental Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Borrowings |  |  | 300,000,000.0 |  | $ 300,000,000.0 |  |  |
Current maturities of long-term debt |  |  | 225,700,000 |  | $ 225,700,000 |  |  |
Interest rate during period |  |  |  |  | 5.90% |  |  |
Senior debt |  |  | 248,444,000 |  | $ 248,444,000 |  | 257,111,000 |
Incremental Term Loan | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  | 5.75% |  |  |
Senior Secured Revolver |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | 75,000,000.0 |  | $ 75,000,000.0 |  |  |
Current maturities of long-term debt |  |  | 9,000,000.0 |  | $ 9,000,000.0 |  |  |
Interest rate during period |  |  |  |  | 4.11% |  |  |
Unused capacity, commitment fee percentage |  |  |  |  | 0.50% |  |  |
Senior debt |  |  | 59,000,000 |  | $ 59,000,000 |  | $ 0 |
Remaining borrowing capacity |  |  | $ 1,400,000 |  | $ 1,400,000 |  |  |
Minimum payment on senior secured revolver |  | 15,000,000.0 |  |  |  |  |  |
Excess cash |  | 35,000,000.0 |  |  |  |  |  |
Senior Secured Revolver | Subsequent Event |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 60,000,000.0 |  |  |  |  |  |  |
Senior Secured Revolver | Debt Covenant Period One |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | 60,000,000.0 |  |  |  |  |  |
Senior Secured Revolver | Debt Covenant Period Two |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 50,000,000.0 |  |  |  |  |  |
Senior Secured Revolver | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  | 4.00% |  |  |
Senior Secured Revolver | Prime Rate |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Applicable margin |  |  |  |  | 3.00% |  |  |

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