Goodwill and Other Intangible Assets (Intangible Assets, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 50,567	$ 48,565
Accumulated Amortization	22,055	17,039
Net Carrying Amount	28,512	31,526
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	32,703	31,848
Accumulated Amortization	12,418	9,054
Net Carrying Amount	$ 20,285	$ 22,794
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	1 year	1 year
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	10 years	10 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,636	$ 2,909
Accumulated Amortization	2,462	2,476
Net Carrying Amount	$ 174	$ 433
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	1 year 6 months	1 year
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	3 years	3 years
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 15,228	$ 13,808
Accumulated Amortization	7,175	5,509
Net Carrying Amount	$ 8,053	$ 8,299
Developed Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	4 years	4 years
Developed Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life (in years)	7 years	7 years