Other Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Assets held in Rabbi Trust	$ 32,593	$ 29,134
Right-of-use assets for operating leases, net	15,289
Capitalized software, net	5,477	4,828
Deferred loan costs, net	1,120	1,182
Interest rate swap derivative instrument	525	900
Other non-current assets	1,425	620
Total Other assets, net	$ 56,429	$ 36,664