Stockholders' Equity, Restricted Stock, Stock Options and Noncontrolling Interests (Stock Options Outstanding and Exercisable Table) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 7.80
Stock Options, Range of Exercise Price, Upper Range	$ 22.49
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	481
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	350 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 12.69	$ 9.84	$ 8.90	$ 8.36
Range Of Exercise Prices Seven Point Eight Zero to Nine Point Fifty Seven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 7.80
Stock Options, Range of Exercise Price, Upper Range	$ 9.57
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	43
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	15 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 7.83
Range Of Exercise Prices Ten Point Zero Eight To Ten Point Zero Eight
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 10.08
Stock Options, Range of Exercise Price, Upper Range	$ 10.08
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	195
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	171 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 10.08
Range Of Exercise Prices Ten Point One Zero to Twelve Point Eight Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 10.10
Stock Options, Range of Exercise Price, Upper Range	$ 12.83
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	58
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	288 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 11.79
Range Of Exercise Prices Thirteen Point Three Five To Thirteen Point Three Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 13.35
Stock Options, Range of Exercise Price, Upper Range	$ 13.35
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	23
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	456 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 13.35
Range Of Exercise Prices Thirteen Point Three Seven To Thirteen Point Three Seven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 13.37
Stock Options, Range of Exercise Price, Upper Range	$ 13.37
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	23
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	369 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 13.37
Range Of Exercise Prices Thirteen Point Five Eight to Thirteen Point Five Eight
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 13.58
Stock Options, Range of Exercise Price, Upper Range	$ 13.58
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	1
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	365 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 13.58
Range Of Exercise Prices Fifteen Point Zero Six to Fifteen Point Zero Six
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 15.06
Stock Options, Range of Exercise Price, Upper Range	$ 15.06
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	25
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	547 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 15.06
Range Of Exercise Prices Fifteen Point Four Seven To Fifteen Point Four Seven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 15.47
Stock Options, Range of Exercise Price, Upper Range	$ 15.47
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	38
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	734 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 15.47
Range Of Exercise Prices Sixteen Point Zero Eight To Sixteen Point Zero Eight
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 16.08
Stock Options, Range of Exercise Price, Upper Range	$ 16.08
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	25
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	639 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 16.08
Range Of Exercise Prices Twenty Two Point Four Nine To Twenty Two Point Four Nine
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options, Range of Exercise Price, Lower Range	$ 22.49
Stock Options, Range of Exercise Price, Upper Range	$ 22.49
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options	50
Stock Options, Weighted-Avg. Remaining Contractual Life in Years	821 days
Stock Options, Weighted Average Exercise Price (usd per share)	$ 22.49