Other Current Assets and Other Accrued Expenses - Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Other Assets And Other Accrued Expenses Disclosure [Abstract]
Prepaid property taxes	$ 553		$ 534
Prepaid insurance	439		518
Income taxes receivable	537		1,153
Other	1,592		2,130
Other current assets	$ 3,121	$ 4,098	$ 4,335