Acquisition-related charges (Tables)

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Total acquisition-related costs associated with the National acquisition

These total acquisition-related charges are as follows:

	For Three Months Ended June 30,				For Six Months Ended June 30,
	2013		2012		2013		2012
Acquisition charges:
Amortization of intangible assets	$	81	$	81	$	162	$	162
Retention bonuses	2		7		3		48
Severance and other benefits	—		3		—		15
Stock-based compensation	3		4		6		10
Transaction and other costs	—		9		—		22
As recorded in Acquisition charges	86		104		171		257
Distributor contract termination recorded in COR	—		—		—		21
Total acquisition-related costs	$	86	$	104	$	171	$	278