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Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			1 Months Ended				3 Months Ended
	Mar. 24, 2017	Feb. 12, 2016	May 02, 2017	Mar. 29, 2017	Feb. 15, 2017	Oct. 31, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 11, 2013
Class of Stock [Line Items]
Purchase of equity of subsidiary							$ (278)
Quarterly base dividend declared				$ 0.1594
Preferred stock dividend declared							$ 370
Remaining number of shares available for repurchase							6.9
CCE [Member]
Class of Stock [Line Items]
Variable interest entity, description							The Company has an option to purchase 100% of the issued and outstanding limited liability company interests of CCE for one dollar plus the forgiveness of $0.5 million that the Company loaned to CCE in October 2015.
Options expiration date						Oct. 22, 2023
Forgiveness of loan						$ 500
Afek [Member]
Class of Stock [Line Items]
Purchase of equity of subsidiary							$ 300
Subsidiary stock repurchased equity interest.							1.00%
Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock dividend rate					$ 0.1594
Preferred stock dividend declared							$ 400	$ 400
Dividend declared, date to be paid				May 15, 2017
Dividend declared, record date				May 04, 2017
Common Stock [Member]
Class of Stock [Line Items]
Dividend paid	$ 1,900	$ 1,500
Common Class A [Member]
Class of Stock [Line Items]
Dividends declared per common share	$ 0.075	$ 0.06
Common Class A [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Dividend declared, date to be paid			May 19, 2017
Dividend declared, record date			May 15, 2017
Common Class A [Member] | Subsequent Event [Member] | Board of Directors Chairman [Member]
Class of Stock [Line Items]
Dividends declared per common share			$ 0.075
Common Class B [Member]
Class of Stock [Line Items]
Dividends declared per common share	$ 0.075	$ 0.06
Number of stock authorized to be repurchased									7.0
Common Class B [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Dividend declared, date to be paid			May 19, 2017
Dividend declared, record date			May 15, 2017
Common Class B [Member] | Subsequent Event [Member] | Board of Directors Chairman [Member]
Class of Stock [Line Items]
Dividends declared per common share			$ 0.075

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