(Summary of Restricted Stock Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested Shares, Unvested at beginning of the period	1,178
Unvested Shares, Granted	70
Unvested Shares, Vested	(123)
Unvested Shares, Forfeited	(3)
Unvested Shares, Unvested at end of the period	1,122	[1]
Weighted-Average Price, Unvested at beginning of the period (in usd per share)	$ 17.23
Weighted-Average Price, Granted (in usd per share)	$ 18.82
Weighted-Average Price, Vested (in usd per share)	$ 18.25
Weighted-Average Price, Forfeited (in usd per share)	$ 19.33
Weighted-Average Price, Unvested at end of the period (in usd per share)	$ 17.21

[1] Does not include 800,000 shares of restricted stock awarded to certain executives which are subject to performance vesting conditions and are not entitled to vote or receive dividends during the performance period.