Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Deferred compensation plan	$ 25,695	$ 24,238
Supplemental executive retirement plan	11,777	11,337
Other	4,839	5,051
Other long-term liabilities	$ 42,311	$ 40,626