Share Based and Deferred Compensation (Details Textuals) (Details) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended			3 Months Ended					0 Months Ended			12 Months Ended
	Mar. 31, 2014	Dec. 31, 2011 Stock Option [Member]	Mar. 31, 2014 Restricted Stock [Member]	Mar. 31, 2013 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member]	Mar. 31, 2014 Restricted Stock [Member] Minimum [Member]	Mar. 31, 2014 Restricted Stock [Member] Maximum [Member]	Mar. 31, 2014 Restricted Performance Share Units Plan [Member]	Mar. 31, 2013 Restricted Performance Share Units Plan [Member]	Mar. 31, 2014 Executive Officer [Member] Restricted Stock [Member]	Mar. 11, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member]	Mar. 12, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member]	Mar. 01, 2012 Executive Officer [Member] Restricted Performance Share Units Plan [Member]	Feb. 25, 2014 Executive Officer [Member] Restricted Performance Share Units Plan [Member]	Feb. 25, 2013 Executive Officer [Member] Restricted Performance Share Units Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Voluntary Termination Of Employment Terms			after reaching age 57 and accumulating at least 15 years of service with the Company					after reaching age 57 and accumulating at least 15 years of service with the Company
Accumulated Service Period For Voluntary Termination			15 years					15 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Term, Minimum	3 years		3 years			3 years	7 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			three years from the initial grant date
Maximum Percentage Of Participants Base Units								200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value											$ 2,624,000	$ 1,225,000	$ 4,273,000	$ 4,137,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number			687,904		563,713						134,284.00	61,720.00	211,521.00		203,395.00
Vested/Exerciseable, shares	2,983,569
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition			1 year 8 months 12 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized			3,300,000
Allocated Share-based Compensation Expense		300,000	1,400,000	900,000				1,700,000	1,200,000
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount			$ 200,000	$ 200,000				$ 400,000	$ 300,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			70,548						150,829
Age Limit Of Voluntary Termination Of Employment										57