Acquisition charges (Tables)

3 Months Ended

Mar. 31, 2014

Business Combination, Separately Recognized Transactions [Abstract]

Acquisition charges

These acquisition charges are as follows:

	For Three Months Ended March 31,
	2014		2013
Amortization of intangible assets	$	80	$	81
Stock-based compensation	3		3
Retention bonuses	—		2
Acquisition charges	$	83	$	86