Incentive Plans (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Terms of award	10Y
Vesting period	2 years
Stock option [Roll Forward]
Outstanding at beginning of period (in shares)	816
Expired (in shares)	(136)
Exercised (in shares)	(680)
Outstanding at end of period (in shares)	0
Exercisable at end of period (in shares)	0
Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price outstanding at beginning of period (in dollars per share)	$ 0.88
Weighted average exercise price, expired (in dollars per share)	$ 1.09
Exercised (in dollars per share)	$ 0.84
Options additional Disclosures [Abstract]
Unamortized compensation cost related to non-vested stock options	$ 0	$ 0
Stock based compensation expense recorded for the year to date period	0	0
Options to purchase shares of common stock which were excluded from computation of diluted earnings per share due to the effect of being anti-dilutive in the computation of earnings per share (in shares)	0	816
Common shares reserved for issuance (in shares)	5,000
Shares available for future stock option grants	4,320
Intrinsic value, outstanding at end of period	0
Intrinsic value, exercisable at end of period	$ 0