Equity (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Additional information
Compensation expense	$ 330,000	$ 421,000
Equity Plan | ECU
Number of Shares
Outstanding at end of year (in shares)	126,000
Weighted Average Exercise Price Per Share
Exercise price (in dollars per share)	$ 16.00
Equity Plan | Restricted stock grants
Number of Shares
Outstanding at the beginning of year (in shares)	915,971
Restrictions lifted during the year (in shares)	(8,833)
Outstanding at the end of year (in shares)	907,138
Weighted Average Grant Date Fair Value Per Share
Outstanding at the beginning of year (in dollars per share)	$ 2.47
Restrictions lifted during the year (in dollars per share)	$ 8.64
Outstanding at the end of year (in dollars per share)	$ 2.41
Additional information
Compensation expense	100,000
Additional compensation expense expected to be recognized	500,000
Period for recognition of additional compensation expense	27 months
Equity Plan | Restricted stock grants | Officers and employees
Number of Shares
Restrictions lifted during the year (in shares)	8,833
Equity Plan | Stock options
Number of Shares
Outstanding at beginning of year (in shares)	110,810
Forfeited or expired during period (in shares)	(15,000)
Outstanding at end of year (in shares)	95,810
Exercisable at end of period (in shares)	95,810
Granted and vested (in shares)	95,810
Weighted Average Exercise Price Per Share
Outstanding at beginning of year (in dollars per share)	$ 8.02
Outstanding at the end of year (in dollars per share)	$ 8.02
Exercisable at end of period (in dollars per share)	$ 8.02
Granted and vested (in dollars per share)	$ 8.02
Deferred Compensation Plan | RSUs
Number of Shares
Outstanding at the beginning of year (in shares)	585,285
Outstanding at the end of year (in shares)	585,285
Weighted Average Grant Date Fair Value Per Share
Outstanding at the beginning of year (in dollars per share)	$ 2.97
Outstanding at the end of year (in dollars per share)	$ 2.97
Additional information
Compensation expense	200,000
Additional compensation expense expected to be recognized	$ 100,000
Period for recognition of additional compensation expense	6 months
Weighted Average Exercise Price Per Share
Number of unrestricted common shares that the Director is entitled to receive for each vested RSU, upon termination from board service	1