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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%