CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 16,194	$ 11,900
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized shares	40,000,000	40,000,000
Common stock, issued shares	21,344,741	21,344,741
Common stock, outstanding shares	21,344,741	21,344,741