Earnings Per Share Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income from continuing operations		$ 16,142	$ 17,327	$ 33,029	$ 35,245
Net Income (Loss) Attributable to Noncontrolling Interest		989	1,263	1,900	2,492
Income (Loss) from Continuing Operations Attributable to Parent		15,153	16,064	31,129	32,753
Noncontrolling Interest, Change in Redemption Value	[1]	101	157	(479)	251
Preferred Stock Dividends and Other Adjustments		(869)	(869)	(1,738)	(1,738)
Other Preferred Stock Dividends and Adjustments	[2]	(970)	(1,026)	(1,259)	(1,989)
Net Income (Loss) from Continuing Ops Available to Common Stockholders, Basic	[2]	14,183	15,038	29,870	30,764
Net income from discontinued operations		1,245	1,546	3,310	3,640
Net income attributable to common shareholders for earnings per share calculation	[2]	$ 15,428	$ 16,584	$ 33,180	$ 34,404
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.17	$ 0.19	$ 0.37	$ 0.38
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share		0.02	0.02	0.04	0.05
Earnings Per Share, Basic		$ 0.19	$ 0.21	$ 0.41	$ 0.43
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Basic Common Shares Outstanding		81,236,809	80,778,562	81,269,154	80,647,191

[1] See Part II. Item 8. “Financial Statements and Supplementary Data—Note 14: Noncontrolling Interests” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 for a description of the redemption values related to the redeemable noncontrolling interests. In accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, Distinguishing Liabilities from Equity (“ASC 480”), an increase in redemption value 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.

[2] The Company presents its EPS based on the treasury stock method. The Company reverted to the treasury stock presentation from the two-class presentation due to the immaterial number of participating shares outstanding as of March 31, 2016. If the EPS presentation had been based on the two-class method, the following adjustments would have been made to the presentation of EPS for the three and six months ended June 30, 2016. Net income attributable to common shareholders would have been reduced by an additional $4 thousand, for the six months ended June 30, 2016, and the allocation of net income to participating securities would have been $1 thousand and $6 thousand, for the three and six months ended June 30, 2016, respectively, reducing net income attributable to common shareholders by a total of $1 thousand and $10 thousand, for the three and six months ended June 30, 2016, respectively. Basic EPS would not change. Weighted average diluted shared outstanding would have been reduced by 3,847 shares and 19,522 shares for the three and six months ended June 30, 2016, respectively. Diluted EPS would not change.If the EPS presentation had been based on the two-class method, the following adjustments would have been made to the presentation of EPS for the three and six months ended June 30, 2015. Net income attributable to common shareholders would have been reduced by an additional $38 thousand and $80 thousand, for the three and six months ended June 30, 2015, respectively, and the allocation of net income to participating securities would have been $33 thousand and $92 thousand, for the three and six months ended June 30, 2015, respectively, reducing net income attributable to common shareholders by a total of $71 thousand and $172 thousand, for the three and six months ended June 30, 2015, respectively. Basic EPS would decrease by $0.01 per share for both the three and six months ended June 30, 2015. Weighted average diluted shared outstanding would have been reduced by 221,902 shares and 282,399 shares, for the three and six months ended June 30, 2015, respectively. Diluted EPS would not change.