Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance for doubtful accounts	$ 3,577	$ 4,045
Property and equipment, accumulated depreciation	41,194	39,368
Other intangible assets, accumulated amortization	41,232	38,419
Other Intangible Assets [Member]
Other intangible assets, accumulated amortization	$ 42,567	$ 39,754