Leases (Future Minimum Lease Payments under Non-Cancelable Operating Leases) (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
Future Minimum Rent, 2019	$ 34,356
Future Minimum Rent, 2020	29,242
Future Minimum Rent, 2021	22,717
Future Minimum Rent, 2022	19,885
Future Minimum Rent, 2023	16,280
Future Minimum Rent, Thereafter	45,959
Future Minimum Rent Under Operating Leases	168,439
Future Minimum Sublease Income, 2019	(1,719)
Future Minimum Sublease Income, 2020	(1,719)
Future Minimum Sublease Income	(3,438)
Future Commitments Under Failed Sales Leaseback Agreement, 2019	1,193
Future Commitments Under Failed Sales Leaseback Agreement, 2020	1,557
Future Commitments Under Failed Sales Leaseback Agreement, 2021	1,603
Future Commitments Under Failed Sales Leaseback Agreement, 2022	1,650
Future Commitments Under Failed Sales Leaseback Agreement, 2023	1,701
Future Commitments Under Failed Sales Leaseback Agreement, thereafter	2,052
Future Minimum Commitments Under Failed Sale Leaseback Agreement	9,756
Net Commitment, 2019	33,830
Net Commitment, 2020	29,080
Net Commitment, 2021	24,320
Net Commitment, 2022	21,535
Net Commitment, 2023	17,981
Net Commitment, Thereafter	48,011
Net Commitments	$ 174,757