Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities [Abstract]
Deferred tax liabilities	$ 16,177	$ 16,017
Reserve for other tax liabilities	9,463	7,324
Reserve for customs assessment	3,600	4,727
Liability for deferred compensation plan	33,456	32,398
Pension plan benefits reserve	4,859	5,844
Build to suit - financing obligation	10,238	10,421
Deferred rent and deferred tenant incentives	6,336	7,102
Asset retirement obligation	4,682	4,611
Other	2,069	656
Total other liabilities	$ 90,880	$ 89,100