Unconsolidated Subsidiaries (Schedule) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Variable Interest Entity [Line Items]
Revenues	$ 173,421	$ 193,734
Gross profit	40,005	38,189
Net income	2,802	1,027
Variable interest entity, not primary beneficiary
Variable Interest Entity [Line Items]
Revenues	145,070	148,071
Gross profit	18,748	18,878
Income before income taxes	13,121	13,119
Net income	$ 10,010	$ 10,155