Stock-Based Compensation (Schedule of Restricted Stock Awards) (Details) (USD $)	0 Months Ended	12 Months Ended
	Mar. 15, 2011	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 3/15/2011 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 7/21/2011 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 8/29/2011 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 2/1/2012 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 3/6/2012 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 5/23/2012 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 12/11/2012 [Member]	Dec. 31, 2013 Restricted Stock [Member] Grant Date - 2/27/13 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date		March 15, 2011	July 21, 2011	August 29, 2011	February 1, 2012	March 6, 2012	May 23, 2012	December 11, 2012	February 27, 2013
Shares		24,836	16,600	5,000	66,000	18,347	8,000	16,330	12,973
Grant Date Fair Value	$ 38.46	$ 38.46	$ 38.44	$ 24.50	$ 30.15	$ 27.49	$ 28.05	$ 41.98	$ 42.49
Aggregate Fair Value		$ 955,000	$ 638,000	$ 123,000	$ 1,990,000	$ 504,000	$ 224,000	$ 686,000	$ 551,000