Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2012

Stockholders' Equity [Abstract]

Summary of Stock option activity

				Weighted -		Weighted -
				Average		Average
				Exercise		Remaining		Aggregate
	Number			Price Per		Contractual		Intrinsic
	of Shares			Share		Term (in years)		Value
Outstanding at December 31, 2011		2,130		$	27.46
Granted		381			33.84
Exercised		(323	)		24.72
Forfeited		(105	)		30.91
Outstanding at September 30, 2012		2,083		$	28.88		6.43	$	4,339
Exercisable at September 30, 2012		1,202		$	26.19		4.77	$	3,973

Details of Restricted stock unit activity

				Weighted-
				Average
	Number of			Grant Date
	Shares			Fair Value
Unvested at December 31, 2011		267		$	29.93
Granted		179			33.88
Vested or settled		(49	)		27.60
Forfeited		(72	)		27.68
Unvested at September 30, 2012		325		$	32.96

Summary of Stock-based compensation recorded in expense categories

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Cost of services and fulfillment	$	835	$	678	$	2,213	$	1,325
Selling and marketing		207		294		638		686
General and administrative		367		440		1,070		1,082
Total	$	1,409	$	1,412	$	3,921	$	3,093

Valuation of options granted under the equity incentive plans and shares subject to purchase under the employee stock purchase plan

	Three Months Ended						Three Months Ended
	September 30, 2012						September 30, 2011
	Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
	Plans			Purchase Plan			Plans			Purchase Plan
Average risk-free interest rate		0.62	%		0.14	%		1.11	%		0.08	%
Expected dividend yield		1.7	%		1.7	%		None			None
Expected life		4.5 Years			0.5 Years			3.5 Years			0.5 Years
Expected volatility		40	%		31	%		40	%		28	%
Weighted average fair value	$	9.42		$	6.89		$	10.01		$	7.56
	Nine Months Ended						Nine Months Ended
	September 30, 2012						September 30, 2011
	Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
	Plans			Purchase Plan			Plans			Purchase Plan
Average risk-free interest rate		0.87	%		0.14	%		1.29	%		0.14	%
Expected dividend yield		1.7	%		1.7	%		None			None
Expected life		4.5 Years			0.5 Years			3.5 Years			0.5 Years
Expected volatility		40	%		31	%		40	%		28	%
Weighted average fair value	$	9.81		$	6.87		$	10.53		$	7.55