Common Shares and Earnings Per Share - Reconciliation of common shares outstanding (Details)	6 Months Ended
	Jun. 30, 2013
Stockholders Equity and Earnings Per Share [Abstract]
Common Shares Outstanding, December 31, 2012	36,168,368
Issuances:
Stock Options Exercised	53,809
Vesting of Restricted Stock Units	17,435
Restricted Stock Issued to Employees	17,000
Restricted Stock Issued to Directors	16,000
Director's Compensation	4,535
Retirements:
Shares Withheld for Individual Income Tax Requirements	(7,184)
Forfeiture of Unvested Restricted Stock	(2,000)
Common Shares Outstanding, June 30, 2013	36,267,963