Leases - Additional Information (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) lease	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Leases [Abstract]
Letters of credit outstanding, amount related to leases	$ 1,136,000
Leases expiring with no renewal options, next 5 years | lease	23
Leases expiring with no renewal options, current year | lease	3
Leases expiring with renewal options, next 5 years | lease	48
Rent expense excluding deferred lease liabilities	$ 124,952,000	$ 124,920,000	$ 124,816,000
Non-base rent expense	25,384,000	24,767,000	24,340,000
Rent expense	124,333,000	123,872,000	124,449,000
Rental income	2,338,000	4,669,000	4,791,000
Rental income above base rent	$ 0	0	229,000
Rental income from owned property		$ 1,926,000	$ 2,000,000