Earnings Per Share Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income from continuing operations		$ 16,887	$ 17,918
Net Income (Loss) Attributable to Noncontrolling Interest		911	1,229
Income (Loss) from Continuing Operations Attributable to Parent		15,976	16,689
Noncontrolling Interest, Change in Redemption Value	[1]	(580)	94
Preferred Stock Dividends and Other Adjustments		(869)	(869)
Other Preferred Stock Dividends and Adjustments	[2]	(289)	(963)
Net Income (Loss) from Continuing Ops Available to Common Stockholders, Basic	[2]	15,687	15,726
Net income from discontinued operations	[2]	2,065	2,094
Net income attributable to common shareholders for earnings per share calculation	[2]	$ 17,752	$ 17,820
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.19	$ 0.19
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share		0.03	0.03
Earnings Per Share, Basic		$ 0.22	$ 0.22
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Basic Common Shares Outstanding		81,301,499	80,514,359

[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 months ended March 31, 2016. Net income attributable to common shareholders would have been reduced by an additional $4 thousand, and the allocation of net income to participating securities would have been $6 thousand, reducing net income attributable to common shareholders by a total of $10 thousand. Basic EPS would not change. Weighted average diluted shared outstanding would have been reduced by 37,298 shares. 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 months ended March 31, 2015. Net income attributable to common shareholders would have been reduced by an additional $43 thousand, and the allocation of net income to participating securities would have been $60 thousand, reducing net income attributable to common shareholders by a total of $103 thousand. Basic EPS would not change. Weighted average diluted shared outstanding would have been reduced by 341,603 shares. Diluted EPS would not change.