Merger, Acquisition and Other Integration Expenses (Tables)

3 Months Ended

Mar. 31, 2012

Merger Acquisition and Other Integration Expenses [Abstract]

Schedule of business combination integration expenses

	2012		2011
Termination, severance and transitional employee costs	$	7,685	$	3,807
Professional fees		2,216		2,181
Office closure, travel and other costs		827		—
Total	$	10,728	$	5,988