Equity Incentive Plan Details 3 (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Aggregate Intrinsic Value [Abstract]
Restricted Stock Units, Nonvested, Intrinsic Value	$ 26,100,000	$ 25,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted Stock Units, Nonvested, Number, Beginning	131,025
Restricted Stock Units, Grants in Period	29,507	43,078
Restricted Stock Units, Vested in Period	(46,044)
Restricted Stock Units, Forfeited in Period	(6,706)
Restricted Stock Units, Nonvested, Number, Ending	107,782	131,025