Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 125,423	$ 116,779
Accumulated depreciation	(54,470)	(47,635)
Property, plant and equipment, net	82,108	80,679
Outside United States [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	21,100	23,700
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,606	2,715
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46,281	43,190
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	76,536	70,874
Property, Plant and Equipment Placed in Service, Net [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	70,953	69,144
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,155	$ 11,535