Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

The amounts of stock-based compensation expense recognized were as follows (in thousands):

	Three Months Ended March 31,
	2013		2012
Stock-based compensation expense recognized as part of selling, general and administrative expense	$	1,160	$	1,534