Leases - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019
Lessee Lease Description [Line Items]
Right-of-use assets		$ 536,532
Lease liabilities		$ 569,664
Operating leases remaining lease term	1 year
ASU 2016-02 [Member]
Lessee Lease Description [Line Items]
Right-of-use assets	$ 500,300
Lease liabilities	$ 526,600
Minimum [Member]
Lessee Lease Description [Line Items]
Lessee operating and finance lease term of contract		5 years
Minimum [Member] | Copiers and Equipment [Member]
Lessee Lease Description [Line Items]
Lessee operating and finance lease term of contract		1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Lessee operating and finance lease term of contract		30 years
Maximum [Member] | Copiers and Equipment [Member]
Lessee Lease Description [Line Items]
Lessee operating and finance lease term of contract		3 years