CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total USD ($)	Common Class A [Member]	Common Class B [Member]	Common Stock [Member] Common Class A [Member] USD ($)	Common Stock [Member] Common Class B [Member]	Additional Paid-In Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Non-Controlling Interests [Member] USD ($)
Balance at Dec. 31, 2013	$ 58,549			$ 121		$ 9,750	$ 6,491	$ 42,187
Balance (in shares) at Dec. 31, 2013		12,158,057	52,820,720	12,158,057	52,820,720
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unit Conversion, Value	0			0		0		0
Unit Conversion, Shares				0	0
Amortization of Non-Cash Compensation	1,551					290		1,261
Amortization of Non-Cash Compensation (in shares)				18,535	17,685
Directors' Shares	198					37		161
Net Income	26,708						3,572	23,136
Options Exercised	0			1		37		(38)
Options Exercised, shares				68,346	95,199
Repurchase and Retirement of Class A Common Stock	(373)			0		(373)		0
Repurchase and Retirement Shares/Units (in shares)		(34,572)	(51,139)	(34,572)	(51,139)
Repurchase and Retirement of Class B Units	(541)					(101)		(440)
Repurchase and Retirement of Class B Unit Options	0							0
Class A Cash Dividends Declared and Paid ($0.29 per share)	(3,531)						(3,531)
Contributions from Non-Controlling Interests	1,578							1,578
Distributions to Non-Controlling Interests	(28,854)							(28,854)
Other						(7)		7
Balance at Jun. 30, 2014	55,285			122		9,633	6,532	38,998
Balance (in shares) at Jun. 30, 2014		12,210,366	52,882,465	12,210,366	52,882,465
Balance at Mar. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	14,407
Options Exercised, shares				68,346	95,199
Repurchase and Retirement Shares/Units (in shares)		(34,572)	(47,663)
Balance at Jun. 30, 2014	$ 55,285			$ 122
Balance (in shares) at Jun. 30, 2014		12,210,366	52,882,465	12,210,366	52,882,465