Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2014

Summary of Dividends Declared

The Executive Committee, acting on behalf of the Board of Directors, declared the following dividends during the periods presented:

Declaration Date	Dividend Per Share		Record Date		Total Amount (in  thousands)		Payment Date
February 5, 2014	$	0.15		March 10, 2014	$	19,602		March 27, 2014
February 5, 2013	$	0.13		March 11, 2013	$	17,983		March 28, 2013

Weighted Average Assumptions of Black-Scholes Option-Pricing Model

The fair value of the stock options granted during the three months ended March 31, 2014 was estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:

Risk-free interest rate		1.12	%
Expected volatility		43.02	%
Expected life (in years)		4.08
Dividend yield		0.76	%
Weighted-average estimated fair value of options granted	$	25.91