Share-Based Compensation Nonvested Shares (Details) (Restricted Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013		Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted				62,137
Vested				(35,623)
Granted				$ 41.84
Shares Paid for Tax Withholding for Share Based Compensation	20,880
Total Fair Value		$ 2,290	[1]	$ 1	[1]
Nonvested Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Jan. 01, 2013		95,241
Granted		0
Vested		(47,291)	[2]
Outstanding, Sept. 30, 2013	47,950	47,950
Weighted Average Grant Date Fair Value Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Oustanding, Jan. 01, 2013		$ 40.42
Granted		$ 0.00
Vested		$ 39.12
Oustanding, Sept. 30, 2013	$ 41.71	$ 41.71

[1] Total fair value of shares vested was calculated based on the quoted closing share price of the Company’s common stock on the NYSE on the date of vesting.

[2] The total shares vested include 20,880 shares that were tendered in accordance with the terms of the 2006 Plan to satisfy minimum statutory tax withholding requirements related to the restricted shares that have vested. We accept the return of shares at the current quoted closing share price of the Company’s common stock to satisfy tax obligations.