Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Share-Based Compensation Expense

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Equity-classified awards:
Stock option awards	$	1,114	$	950	$	1,906	$	2,158
Common, deferred and restricted stock and stock unit awards	1,572		386		1,865		793
	2,686		1,336		3,771		2,951
Liability-classified awards	435		553		449		625
	$	3,121	$	1,889	$	4,220	$	3,576