Earnings Per Share Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income from continuing operations		$ 23,493	$ 16,142	$ 38,489	$ 33,029
Net Income (Loss) Attributable to Noncontrolling Interest		1,150	989	2,116	1,900
Income (Loss) from Continuing Operations Attributable to Parent		22,343	15,153	36,373	31,129
Noncontrolling Interest, Change in Redemption Value	[1]	(292)	101	5	(479)
Preferred Stock Dividends and Other Adjustments		(869)	(869)	(1,738)	(1,738)
Other Preferred Stock Dividends and Adjustments		(577)	(970)	(1,743)	(1,259)
Net Income (Loss) from Continuing Ops Available to Common Stockholders, Basic		21,766	14,183	34,630	29,870
Net income from discontinued operations		1,063	1,245	2,695	3,310
Net income attributable to common shareholders for earnings per share calculation		$ 22,829	$ 15,428	$ 37,325	$ 33,180
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.27	$ 0.17	$ 0.42	$ 0.37
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share		0.01	0.02	0.03	0.04
Earnings Per Share, Basic		$ 0.28	$ 0.19	$ 0.45	$ 0.41
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted Average Basic Common Shares Outstanding		82,298,493	81,236,809	82,125,795	81,269,154

[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, 2016 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.