Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Expense Components [Line Items]
Income before income taxes	$ 33,456	$ 23,768	$ 55,005	$ 48,093
Income tax expense	9,963	7,626	16,516	15,064
Net income from continuing operations	23,493	16,142	$ 38,489	$ 33,029
Effective Income Tax Rate, Continuing Operations			30.00%	31.30%
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax			$ 4,606	$ 5,658
Discontinued Operation, Tax Effect of Discontinued Operation			1,911	2,348
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	1,063	1,245	$ 2,695	$ 3,310
Effective Tax Rate Discontinued Operations			41.50%	41.50%
Tax effect Attributable to Noncontrolling Interests			$ 0	$ 0
Net income attributable to noncontrolling interests	1,150	989	$ 2,116	$ 1,900
Effective Tax Rate Noncontrolling Interests			0.00%	0.00%
Income from Continuing and Discontinued Operations Attributable to Parent Before Tax			$ 57,495	$ 51,851
Tax Expense (Benefit) Total			18,427	17,412
Net income attributable to the Company	$ 23,406	$ 16,398	$ 39,068	$ 34,439
Effective Tax Rate Total			32.00%	33.60%