Share-Based Compensation-Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Number of Options
Outstanding at beginning of year	1,922,408
Granted	125,487	[1]	395,280	[1]	69,500	[1]
Expired/cancelled/forfeited	(44,554)
Exercised	(78,400)
Outstanding at end of year	1,924,941		1,922,408
Wgtd. Avg. Exercise Price
Outstanding at beginning of year (usd per share)	$ 5.56
Granted (usd per share)	$ 5.51
Expired/cancelled/forfeited (usd per share)	$ 6.71
Exercised (usd per share)	$ 3.32
Outstanding at end of year (usd per share)	$ 5.61		$ 5.56
Additional Disclosures
Options exercisable at end of year	1,534,311
Options expected to vest	371,098
Options exercisable at end of year (usd per share)	$ 5.31
Options expected to vest (usd per share)	$ 6.79
Outstanding, remaining contractual term	5 years
Exercisable, remaining contractual term	4 years 1 month 6 days
Vested and expected to vest, remaining contractual term	8 years 9 months 18 days
Outstanding, intrinsic value	$ 1,114
Exercisable, intrinsic value	1,114
Vested and expected to vest, intrinsic value	$ 48

[1] Prior to applying estimated forfeiture rate