Earnings Per Share (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares Excluded Due to Exercise Price Exceeding Average Price During Period																	1,399,000		2,101,000		6,733,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																	1,000		323,000		1,504,000
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest																	$ 66,691,000		$ 48,758,000		$ 36,101,000
Net Income (Loss) Attributable to Noncontrolling Interest	1,178,000	[1]	871,000	[1]	969,000	[1]	930,000	[1]	715,000	[1]	855,000	[1]	759,000	[1]	793,000	[1]	3,948,000		3,122,000		3,148,000
Income (Loss) from Continuing Operations Attributable to Parent																	62,743,000		45,636,000		32,953,000
Noncontrolling Interest, Change in Redemption Value																	(368,000)	[2]	(415,000)	[2]	(515,000)	[2]
Preferred Stock Dividends and Other Adjustments																	(14,689,000)	[3]	(366,000)		(373,000)
Other Preferred Stock Dividends and Adjustments																	(15,057,000)		(781,000)		(888,000)
Net Income Loss Continuing Available to Common Shareholders Basic Before Participating																	47,686,000		44,855,000		32,065,000
Undistributed Earnings Continuing Ops Allocated to Participating Securities																	(1,243,000)		(4,499,000)		(3,144,000)
Net Income (Loss) from Continuing Ops Available to Common Stockholders, Basic																	46,443,000		40,356,000		28,921,000
Net income from discontinued operations	1,968,000	[1]	1,321,000	[1]	2,781,000	[1]	1,722,000	[1]	1,819,000	[1]	1,672,000	[1]	2,590,000	[1]	1,554,000	[1]	7,792,000		7,635,000		6,184,000
Undistributed Earnings Discontinued Operations Allocated to Participating Securities																	(336,000)		(821,000)		(669,000)
Net Income (Loss) from Discontinued Ops Available to Common Stockholders, Basic																	7,456,000		6,814,000		5,515,000
Net Income (Loss) Available to Common Stockholders Basic before Allocation to Participating Securities																	55,478,000		52,490,000		38,249,000
Undistributed Earnings Allocated to Participating Securities																	(1,579,000)		(5,320,000)		(3,813,000)
Net Income Available to Common Stockholders, Basic																	53,899,000		47,170,000		34,436,000
Income (Loss) from Continuing Operations, Per Diluted Share																	$ 0.59		$ 0.52		$ 0.39
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share																	$ 0.09		$ 0.09		$ 0.07
Income (Loss) from Continuing Operations, Per Basic Share																	$ 0.60		$ 0.53		$ 0.39
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share																	$ 0.10		$ 0.09		$ 0.07
Earnings (Loss) Per Share, Basic:	$ 0.21	[4]	$ 0.23	[4]	$ 0.11	[4]	$ 0.15	[4]	$ 0.15	[4]	$ 0.19	[4]	$ 0.17	[4]	$ 0.11	[4]	$ 0.70		$ 0.62		$ 0.46
Earnings/ (Loss) Per Share, Diluted	$ 0.20	[4]	$ 0.22	[4]	$ 0.11	[4]	$ 0.15	[4]	$ 0.15	[4]	$ 0.19	[4]	$ 0.17	[4]	$ 0.11	[4]	$ 0.68		$ 0.61		$ 0.46
Common Stock, Dividends, Per Share, Cash Paid																	$ 0.24		$ 0.04		$ 0.04
Interest on Convertible Debt, Net of Tax																	0		900,000		1,600,000
Dilutive Securities, Effect on Basic Earnings Per Share																	0		0		0
Net Income (Loss) from Continuing Operations Available to Common Stockholders, Diluted																	46,443,000		40,356,000		28,921,000
Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Preferred Stock Dividends and Other Adjustments																	$ (11,700,000)
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Outstanding, Basic																	77,373,817		76,019,991		75,169,611
Incremental Common Shares Attributable to Share-based Payment Arrangements																	656,066	[5]	579,627	[5]	206,588	[5]
Incremental Common Shares Attributable to Call Options and Warrants																	723,641	[5]	373,898	[5]	104,829	[5]
Weighted Average Number Diluted Shares Outstanding Adjustment																	1,379,707		953,525		311,417
Weighted Average Number of Shares Outstanding, Diluted																	78,753,524	[5]	76,973,516	[5]	75,481,028	[5]
Convertible Debt Securities [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																	1,000	[6]	323,000	[6]	1,504,000	[6]
Stock Compensation Plan [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares Excluded Due to Exercise Price Exceeding Average Price During Period																	1,399,000	[7]	2,101,000	[7]	3,845,000	[7]
Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares Excluded Due to Exercise Price Exceeding Average Price During Period																	0	[8]	0	[8]	2,888,000	[8]

[1] Due to rounding, the sum of the four quarters may not add to the year to date total.

[2] See Part II. Item 8. “Financial Statements and Supplementary Data—Note 14: Noncontrolling Interests” for a description of the redemption values related to the redeemable noncontrolling interests. In accordance with ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), an increase in redemption values from period to period reduces income attributable to common shareholders. Decreases in redemption value from period to period increase income attributable to common shareholders, but only to the extent that the cumulative change in redemption value remains a cumulative increase since adoption of this standard in the first quarter of 2009.

[3] Consideration paid in excess of carrying value for the repurchase of the Series B preferred stock of $11.7 million is considered a deemed dividend and, for purposes of calculating EPS, reduces net income attributable to common shareholders for the year ended December 31, 2013.

[4] Includes the effect of adjustments to net income attributable to the Company to arrive at net income attributable to common shareholders.

[5] The diluted EPS computations for the years ended December 31, 2013, 2012, and 2011 do not assume the conversion, exercise or contingent issuance of the following shares for the following periods because the result would have been antidilutive for the periods indicated. As a result of the anti-dilution, the potential common shares excluded from the diluted EPS computation are as follows: For the year ended December 31, 2013 2012 2011Shares excluded due to anti-dilution (treasury method):(In thousands)Potential common shares from: Convertible trust preferred securities (a)1 323 1,504Total shares excluded due to anti-dilution1 323 1,504 For the year ended December 31, 2013 2012 2011Shares excluded due to exercise price exceeding the average market price of common shares during the period (total outstanding):(In thousands)Potential common shares from: Options, restricted stock, or other dilutive securities (b)1,399 2,101 3,845Warrants (c)— — 2,888Total shares excluded due to exercise price exceeding the average market price of common shares during the period1,399 2,101 6,733(a) If the effect of the conversion of the trust preferred securities would have been dilutive, interest expense, net of tax, related to the convertible trust preferred securities of $0.9 million and $1.6 million for the years ended December 31, 2012 and 2011, respectively, would have been added back to net income attributable to common shareholders for diluted EPS computations for the periods presented. An immaterial amount would have been added back for the year ended December 31, 2013.(b)Options to purchase shares of common stock, non-participating (performance-based) restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods. (c)Certain warrants to purchase shares of common stock that were outstanding at period ends were not included in the computations of diluted EPS because the warrants’ exercise price was greater than the average market price of the common shares during the respective period.

[6] If the effect of the conversion of the trust preferred securities would have been dilutive, interest expense, net of tax, related to the convertible trust preferred securities of $0.9 million and $1.6 million for the years ended December 31, 2012 and 2011, respectively, would have been added back to net income attributable to common shareholders for diluted EPS computations for the periods presented. An immaterial amount would have been added back for the year ended December 31, 2013.

[7] Options to purchase shares of common stock, non-participating (performance-based) restricted stock, and other dilutive securities that were outstanding at period ends were not included in the computation of diluted EPS or in the above anti-dilution table because their exercise or conversion prices were greater than the average market price of the common shares during the respective periods.

[8] Certain warrants to purchase shares of common stock that were outstanding at period ends were not included in the computations of diluted EPS because the warrants’ exercise price was greater than the average market price of the common shares during the respective period.