Income Taxes (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 4,211,000	$ 1,604,000
Effective income tax rate	12.01%	8.32%
Operating loss carryforwards, domestic	46,100,000
Unrecognized Tax Benefits	14,875,000		12,742,000	5,925,000
Unrecognized tax benefits, period increase (decrease)	2,133,000	68,000
Unrecognized tax benefits, income tax penalties and interest expense	$ 1,200,000		$ 1,050,000
India [Member]
Operating Loss Carryforwards [Line Items]
Foreign tax holiday (percentage)	50.00%
Foreign statutory income tax rate	33.99%
Foreign income tax holiday, term	5 years
Singapore [Member]
Operating Loss Carryforwards [Line Items]
Foreign statutory income tax rate	17.00%
Foreign effective income tax rate	10.00%