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Borrowing Arrangements - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |
Term loan | $ 199,379,000 | $ 199,172,000
Line of credit facility, maximum borrowing capacity | 400,000,000 | 400,000,000.0
Line of credit facility, additional borrowing capacity | $ 100,000,000 | 100,000,000.0
Line of credit facility, expiration date | Jul. 17, 2018 |
Line of credit facility potential term extension period (in years) | 1 year |
Commitment fee |  | 3,500,000
Term Loans |  |
Debt Instrument [Line Items] |  |
Term loan | $ 200,000,000 |
Debt instrument, maturity date | Jan. 10, 2020 |
Derivative, maturity years (in years) | 3 years |
Minimum |  |
Debt Instrument [Line Items] |  |
Interest rate additional above LIBOR (in percentage) | 1.20% |
Interest rate during period (in percentage) | 0.20% |
Minimum | Term Loans |  |
Debt Instrument [Line Items] |  |
Interest rate additional above LIBOR (in percentage) | 1.35% |
Maximum |  |
Debt Instrument [Line Items] |  |
Interest rate additional above LIBOR (in percentage) | 1.65% |
Interest rate during period (in percentage) | 0.35% |
Maximum | Term Loans |  |
Debt Instrument [Line Items] |  |
Interest rate additional above LIBOR (in percentage) | 1.95% |
Mortgages Notes Payable | Adjustments for New Accounting Pronouncement |  |
Debt Instrument [Line Items] |  |
Debt issuance costs |  | (18,900,000)
Term Loan | Adjustments for New Accounting Pronouncement |  |
Debt Instrument [Line Items] |  |
Debt issuance costs |  | (800,000)
Escrow Deposits, Goodwill and other Assets | Adjustments for New Accounting Pronouncement |  |
Debt Instrument [Line Items] |  |
Debt issuance costs |  | $ 3,700,000

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