Business Segments Business Segments - Schedule of Business Segments Total Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Assets	$ 593,567	$ 608,467	$ 662,513	$ 643,003	$ 626,432	$ 633,250	$ 661,098	$ 649,692	$ 639,495	$ 616,208
North America [Member]
Segment Reporting Information [Line Items]
Assets	351,768	390,739
International [Member]
Segment Reporting Information [Line Items]
Assets	221,185	195,060
Others [Member]
Segment Reporting Information [Line Items]
Assets	$ 20,614	$ 22,668