Share Based and Deferred Compensation (Details Textuals) (Details) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended				6 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended					0 Months Ended			12 Months Ended
	Jun. 30, 2014	Feb. 07, 2014	Jun. 30, 2013 Stock Option [Member]	Jun. 30, 2013 Stock Option [Member]	Jun. 30, 2014 Restricted Stock [Member]	Jun. 30, 2013 Restricted Stock [Member]	Jun. 30, 2014 Restricted Stock [Member]	Jun. 30, 2013 Restricted Stock [Member]	Mar. 31, 2014 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member]	Jun. 30, 2014 Restricted Stock [Member] Minimum [Member]	Jun. 30, 2014 Restricted Stock [Member] Maximum [Member]	Mar. 01, 2014 Restricted Performance Share Units Plan [Member]	Jun. 30, 2014 Restricted Performance Share Units Plan [Member]	Jun. 30, 2013 Restricted Performance Share Units Plan [Member]	Jun. 30, 2014 Restricted Performance Share Units Plan [Member]	Jun. 30, 2013 Restricted Performance Share Units Plan [Member]	Jun. 30, 2014 Executive Officer [Member] Restricted Stock [Member]	Mar. 12, 2014 Executive Officer [Member] Restricted Stock [Member]	Mar. 11, 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]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																			69,794	131,641	134,284	61,720	265,222.00		231,093
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period																		1,745
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 dates
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									550,222	563,713											134,284.00	61,720.00	211,521.00		203,395.00
Vested/Exerciseable, shares	2,808,784
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition							1 year 10 months 25 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized									2,900,000
Allocated Share-based Compensation Expense			200,000	400,000	500,000	900,000	1,900,000	1,800,000						500,000	1,300,000	2,300,000	2,500,000
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount				$ 100,000	$ 100,000	$ 100,000	$ 400,000	$ 300,000						$ 200,000	$ 200,000	$ 700,000	$ 400,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period							234,169						150,829
Age Limit Of Voluntary Termination Of Employment																		57
Dividends Payable, Amount Per Share		$ 0.15