Acquisition-related charges (Tables)

9 Months Ended

Sep. 30, 2013

Business Combination, Separately Recognized Transactions [Abstract]

Total acquisition-related costs associated with the National acquisition

These total acquisition-related charges are as follows:

	For Three Months Ended September 30,				For Nine Months Ended September 30,
	2013		2012		2013		2012
Acquisition charges:
Amortization of intangible assets	$	81	$	81	$	244	$	244
Retention bonuses	2		5		5		53
Severance and other benefits	—		3		—		17
Stock-based compensation	3		4		8		14
Transaction and other costs	—		13		—		35
As recorded in Acquisition charges	86		106		257		363
Distributor contract termination recorded in COR	—		—		—		21
Total acquisition-related costs	$	86	$	106	$	257	$	384