Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Deferred compensation plan	$ 22,541	$ 22,425
Supplemental executive retirement plan	11,476	10,197
Other	6,036	3,834
Other long-term liabilities	$ 40,053	$ 36,456