Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 1,604,000	$ 2,262,000
Effective income tax rate	8.32%	12.52%
Operating loss carryforwards, domestic	51,200,000
Unrecognized Tax Benefits	5,993,000		5,925,000
Unrecognized tax benefits, period increase (decrease)	68,000
Unrecognized tax benefits, income tax penalties and interest expense	$ 698,000
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%