Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Summary of Share-Based Compensation Expense

The following table summarizes share-based compensation expense recognized for the periods presented:

	Three Months Ended March 31,
	2012		2011
Equity-classified awards:
Stock option plans	$	1,208	$	1,408
Common, deferred, restricted and time-based restricted unit plans		407		388
		1,615		1,796
Liability-classified awards		72		-
	$	1,687	$	1,796