Employee Benefit Plans (Restricted Shares Granted) (Details) (USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2014	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Shares	73,609	257,797		482,340	571,163
Restricted share grants, Market Value Per Share	$ 23.18
Performance Share Units Granted	73,609
Grant Share Amount A [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Jan. 02, 2013	[1]
Restricted share grants, Shares		89,329	[1]
Restricted share grants, Market Value Per Share		$ 20.64	[1]
Restricted share grants, vesting percentage		33.00%	[1]
Restricted share grants Vesting Period, in years		3 years	[1]
Grant Share Amount B [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Jan. 02, 2013	[2]
Restricted share grants, Shares		89,329	[2]
Restricted share grants, Market Value Per Share		$ 30.96	[2]
Restricted share grants, vesting percentage		100.00%	[2]
Restricted share grants Vesting Period, in years		3 years
Restricted stock, vesting date		January 1, 2016	[2]
Grant Share Amount C [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Jan. 02, 2013	[3]
Restricted share grants, Shares		1,620	[3]
Restricted share grants, Market Value Per Share		$ 20.64	[3]
Restricted share grants, vesting percentage		100.00%	[3]
Restricted stock, vesting date		January 1, 2015	[3]
Grant Share Amount D [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Apr. 01, 2013	[3]
Restricted share grants, Shares		2,814	[3]
Restricted share grants, Market Value Per Share		$ 22.88	[3]
Restricted share grants, vesting percentage		100.00%	[3]
Restricted stock, vesting date		January 1, 2015	[3]
Grant Share Amount E [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Jul. 01, 2013	[3]
Restricted share grants, Shares		2,740	[3]
Restricted share grants, Market Value Per Share		$ 23.04	[3]
Restricted share grants, vesting percentage		100.00%	[3]
Restricted stock, vesting date		January 1, 2015	[3]
Grant Share Amount F [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Oct. 01, 2013	[3]
Restricted share grants, Shares		2,389	[3]
Restricted share grants, Market Value Per Share		$ 25.37	[3]
Restricted share grants, vesting percentage		100.00%	[3]
Restricted stock, vesting date		January 1, 2015	[3]
Grant Share Amount G [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Restricted share grants, Date of Grant		Dec. 05, 2013	[4]
Restricted share grants, Shares		53,358	[4]
Restricted share grants, Market Value Per Share		$ 22.49	[4]
Restricted share grants, vesting percentage		33.00%	[4]
Restricted share grants Vesting Period, in years		3 years	[4]

[1] Reflects the grant of restricted shares to our executive officers.

[2] Reflects the grant of performance share units (“PSUs”) to our executive officers. The estimated fair value of the PSUs on grant date was determined using a Monte Carlo simulation model. The PSUs provide for an award based on the performance of our common stock over a three-year period with the maximum award being 200% of the original awarded PSUs and the minimum amount being zero. The vested PSUs will be settled in an equivalent number of shares of our common stock unless the Compensation Committee of our Board of Directors elects to pay in cash.

[3] Reflects the grant of restricted shares to certain members of our Board of Directors who have made an election to take their quarterly fees in stock in lieu of cash.

[4] Reflects annual equity grants to each member of our Board of Directors.