Goodwill and Other Intangible Assets (Intangible Assets, Net) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 50,946	$ 48,565
Accumulated Amortization	17,033	17,039
Net Carrying Amount	33,913	31,526
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,861	31,848
Accumulated Amortization	9,533	9,054
Net Carrying Amount	$ 24,328	$ 22,794
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year	1 year
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years	10 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,604	$ 2,909
Accumulated Amortization	2,146	2,476
Net Carrying Amount	$ 458	$ 433
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	1 year	1 year
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years	3 years
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,481	$ 13,808
Accumulated Amortization	5,354	5,509
Net Carrying Amount	$ 9,127	$ 8,299
Developed Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	4 years	4 years
Developed Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years	7 years