Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Employee contribution percentage	60.00%
Employee contribution amount	$ 17,000
Provident Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution expense recognized by Indian entities	900,000	800,000
Gratuity Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution expense recognized by Indian entities	600,000	600,000
Accrued liability for retirement plan	$ 6,300,000		$ 5,600,000