Share-Based Compensation - Additional Information (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended				12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Stock options [Member]	Jun. 30, 2013 Stock options [Member]	Jun. 30, 2014 Stock options [Member]	Jun. 30, 2013 Stock options [Member]	Jun. 30, 2014 Restricted stock [Member] Installment	Jun. 30, 2013 Restricted stock [Member]	Jun. 30, 2014 Restricted stock [Member] Installment	Jun. 30, 2013 Restricted stock [Member]	Jun. 30, 2014 Stock appreciation rights (SARs) [Member]	Jun. 30, 2013 Stock appreciation rights (SARs) [Member]	Dec. 31, 2006 Stock appreciation rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted	0	107,863
Maximum option term					10 years						10 years
General vesting period					3 years						3 years
Annual vesting percentage					33.33%
Expense recorded for share based compensation			$ 0	$ 0	$ 60,000	$ 26,000	$ 34,000	$ 57,000	$ 72,000	$ 125,000	$ 0	$ 5,000
Total intrinsic value of options exercised					0
Total intrinsic value of options outstanding	$ 255,000
Closing stock price (in dollars per share)	$ 12.18
Number of installments							2		2
Stock appreciation rights shares issued													30,000
Stock appreciation rights price of long term restricted share (in dollars per share)													$ 19.00
Shares expired due to employee terminations													15,500