Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Expense Components [Line Items]
Income before income taxes	$ 28,064	$ 21,549
Income tax expense	6,026	6,553
Net income from continuing operations	$ 22,038	$ 14,996
Effective Income Tax Rate, Continuing Operations	21.50%	30.40%
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	$ 2,388	$ 2,788
Discontinued Operation, Tax Effect of Discontinued Operation	690	1,156
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 1,698	$ 1,632
Effective Tax Rate Discontinued Operations	28.90%	41.50%
Tax effect Attributable to Noncontrolling Interests	$ 0	$ 0
Net income attributable to noncontrolling interests	$ 1,050	$ 966
Effective Tax Rate Noncontrolling Interests	0.00%	0.00%
Income from Continuing and Discontinued Operations Attributable to Parent Before Tax	$ 29,402	$ 23,371
Tax Expense (Benefit) Total	6,716	7,709
Net income attributable to the Company	$ 22,686	$ 15,662
Effective Tax Rate Total	22.80%	33.00%