Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

A summary of restricted stock transactions during the three months ended March 31, 2013 follows:



	Number of shares
Non-vested shares outstanding at January 1, 2013	898,190
Awarded:
Time-vesting (average grant-date fair value of $38.68)	115,557
Performance-based (average grant-date fair value of $36.75)	243,251
Performance-based – achieved 140.83% level (grant-date fair value of $37.91)	93,755
Released:
Time-vesting shares awarded in 2010 through 2012	(144,623	)
Performance-based shares awarded in 2010	(229,624	)
Performance-based awards – achieved 140.83% level	(93,755	)
Non-vested shares outstanding at March 31, 2013	882,751