Annual report pursuant to Section 13 and 15(d)

Other Long-Term Liabilities (Schedule of Other Long-Term Liabilities) (Details)

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Other Long-Term Liabilities (Schedule of Other Long-Term Liabilities) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]    
Straight-line and deferred rent liabilities $ 31,047,000 $ 31,016,000
Asset retirement obligations 4,691,000 4,580,000
Deferred compensation plan liability 9,475,000 9,319,000
Derivative Liability, Noncurrent 1,000 3,820,000
Total other long-term liabilities $ 45,214,000 $ 48,735,000