Stockholders' Equity AOCI Disclosure (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' Equity Attributable to Parent		$ 106,502	$ 118,176		$ 116,540		$ 116,467
Amortization of Intangible Assets		4,956	5,526		3,859
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(9,209)	(4,153)		(3,908)
Interest Rate Swap
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' Equity Attributable to Parent		(158)	(238)		(295)		(332)
OCI, before Reclassifications, Net of Tax, Attributable to Parent		(20)	(58)		(84)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	[1]	100	115		121
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		80	57		37
Accumulated Other Comprehensive (Loss) Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' Equity Attributable to Parent		(16,809)	(7,600)		(3,447)		461
OCI, before Reclassifications, Net of Tax, Attributable to Parent		(9,309)	(4,268)		(4,029)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent		100	115	[1]	121	[1]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(9,209)	(4,153)		(3,908)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' Equity Attributable to Parent		(16,651)	(7,363)		(3,156)		797
OCI, before Reclassifications, Net of Tax, Attributable to Parent		(9,288)	(4,207)		(3,953)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	[1]	0	0		0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(9,288)	(4,207)		(3,953)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' Equity Attributable to Parent		0	1		4		$ (4)
OCI, before Reclassifications, Net of Tax, Attributable to Parent		(1)	(3)		8
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	[1]	0	0		0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		$ (1)	$ (3)		$ 8

[1] For additional information, see Note 2, "Marketable Securities", and see Note 16, "Derivative Instruments and Hedging Activities"