Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounts receivable, allowance for doubtful accounts	$ 4,193	$ 4,045
Property and equipment, accumulated depreciation	40,373	39,368
Other intangible assets, accumulated depreciation	39,826	38,419
Other Intangible Assets [Member]
Other intangible assets, accumulated depreciation	$ 39,704	$ 38,370