Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

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

Share-Based Compensation Expense

Share-based compensation expense for the years ended December 31, 2013, 2012 and 2011 consisted of the following ($ in thousands):

	2013		2012	2011
Restricted stock unit awards	$	21,292	31,553	33,915
UK SAYE	1,030		938	726
	$	22,322	32,491	34,641

Restricted Stock Unit Activity

Restricted stock unit activity for the years ending December 31, 2013 and 2012 is as follows:

		Shares (thousands)		Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life
Unvested at January 1, 2012		1,362.3		$	66.29
	Granted	606.3		67.34
	Vested	(577.7	)	62.24
	Forfeited	(45.0	)	66.52
Unvested at December 31, 2012		1,345.9		$	68.50	1.91
	Granted	244.4		91.01
	Vested	(522.8	)	70.51
	Forfeited	(42.5	)	62.29
Unvested at December 31, 2013		1,025.0		$	73.10	2.03
Unvested shares expected to vest		992.3		$	73.22	2.03

UK SAYE Options Granted

Options activity under the SAYE plan for the years ended December 31, 2013 and 2012 are as follows:

	2013		2012
Options granted	25,400		127,400
Exercise price - options granted	$	77.65	$	59.26
Options exercised	22,241		172,980
Weighted average exercise price	$	47.32	$	19.78