Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

The components of income before income taxes and income tax expense for the years ended December 31, 2012, 2011 and 2010 are as follows (in thousands):

	Years ended December 31,
	2012			2011			2010
Income before income taxes:
Domestic	$	27,827		$	21,976		$	17,452
Foreign		7,975			6,415			3,400
Total income before income taxes	$	35,802		$	28,391		$	20,852
Income tax expense:
Current:
Federal	$	7,846		$	6,869		$	4,746
State and local		1,653			1,750			1,111
Foreign		2,899			1,765			1,328
Total current		12,398			10,384			7,185
Deferred:
Federal		856			310			910
State and local		236			48			133
Foreign		(376	)		(211	)		(108	)
Total deferred		716			147			935
Total income tax expense	$	13,114		$	10,531		$	8,120

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The difference between the expense for income tax expense computed at the statutory rate and the reported amount of income tax expense is as follows:

	December 31,
	2012			2011			2010
Federal income tax rate		35.0	%		35.0	%		35.0	%
State and local taxes net of federal benefit		3.4			4.1			3.8
Foreign taxes		(0.1	)		(1.2	)		2.2
Permanent differences		1.9			2.1			(0.6	)
Valuation allowance adjustments		—			0.1			(0.5	)
Reduction of uncertain tax position liabilities		(4.5	)		(3.1	)		—
Other		0.9			0.1			(1.0	)
Effective tax rate		36.6	%		37.1	%		38.9	%

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits, excluding interest, is as follows (in thousands):

	Years ended December 31,
	2012			2011			2010
Unrecognized tax benefits at beginning of the year	$	1,418		$	2,218		$	2,218
Additions related to current year tax positions		—			—			—
Additions related to prior year tax positions		—			—			—
Settlements		—			—			—
Reductions due to lapse of statute of limitations		(1,418	)		(800	)		—
Unrecognized tax benefits at end of the year	$	—		$	1,418		$	2,218

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The tax effects of temporary differences between the financial reporting and tax basis of assets and liabilities that are included in the net deferred tax assets and liabilities are summarized as follows (in thousands):

	December 31,
	2012			2011
Deferred tax assets:
Allowance for doubtful accounts	$	492		$	380
Accrued liabilities		1,131			1,363
Stock-based compensation expense		499			1,174
Net federal, state and foreign operating loss carryforwards		288			465
Deferred tax assets		2,410			3,382
Deferred tax liabilities:
Intangible assets, property and equipment, principally due to difference in depreciation and amortization		6,990			5,709
Net deferred tax liabilities		(4,580	)		(2,327	)
Less valuation allowance		(263	)		(326	)
Net deferred tax liabilities, net of valuation allowance	$	(4,843	)	$	(2,653	)