Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Capital assets and other	$ 36,449	$ 34,563
Net operating loss carry forwards	41,947	43,280
Interest deductions	21,753	19,285
Refinancing charge	10,153	0
Deferred acquisition consideration	26,779	21,418
Stock compensation	1,433	2,317
Pension plan	0	2,168
Unrealized foreign exchange	2,372	843
Capital loss carry forwards	16,180	17,408
Accounting reserves	4,769	4,721
Gross deferred tax asset	161,835	146,003
Less: valuation allowance	(137,961)	(134,761)
Net deferred tax assets	23,874	11,242
Deferred tax liabilities:
Pension plan	(1,112)	0
Deferred finance charges	(420)	(449)
Capital assets	(178)	(348)
Goodwill amortization	(61,859)	(53,875)
Total deferred tax liabilities	(63,569)	(54,672)
Net deferred tax asset (liability)	(39,695)	(43,430)
Disclosed as:
Deferred tax assets	23,380	9,637
Deferred tax liabilities	(63,075)	(53,067)
Net deferred tax asset (liability)	$ (39,695)	$ (43,430)

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from deferred acquisition consideration, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

No definition available.