Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Industry Segment and Geographic Areas (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets
Revenues:	$ 89,339us-gaap_SalesRevenueNet	$ 96,271us-gaap_SalesRevenueNet	$ 95,662us-gaap_SalesRevenueNet	$ 83,496us-gaap_SalesRevenueNet	$ 81,010us-gaap_SalesRevenueNet	$ 92,963us-gaap_SalesRevenueNet	$ 88,341us-gaap_SalesRevenueNet	$ 71,808us-gaap_SalesRevenueNet	$ 364,768us-gaap_SalesRevenueNet	$ 334,122us-gaap_SalesRevenueNet	$ 319,660us-gaap_SalesRevenueNet
Long-lived assets (all non-current assets):	200,053us-gaap_NoncurrentAssets				188,895us-gaap_NoncurrentAssets				200,053us-gaap_NoncurrentAssets	188,895us-gaap_NoncurrentAssets
Total assets:	341,158us-gaap_Assets				316,058us-gaap_Assets				341,158us-gaap_Assets	316,058us-gaap_Assets
United States
Revenues from External Customers and Long-Lived Assets
Revenues:									309,651	290,019	271,045
Long-lived assets (all non-current assets):	162,368				150,997				162,368	150,997
Total assets:	278,094				255,881				278,094	255,881
Asia
Revenues from External Customers and Long-Lived Assets
Revenues:									10,647	8,085	10,075
Canada
Revenues from External Customers and Long-Lived Assets
Revenues:									12,092	8,514	8,752
Europe
Revenues from External Customers and Long-Lived Assets
Revenues:									19,448	15,677	16,001
Long-lived assets (all non-current assets):	16,273				17,409				16,273	17,409
Total assets:	38,453				36,838				38,453	36,838
Mexico
Revenues from External Customers and Long-Lived Assets
Revenues:									3,941	4,226	6,636
Long-lived assets (all non-current assets):	21,412				20,489				21,412	20,489
Total assets:	24,611				23,339				24,611	23,339
Middle East
Revenues from External Customers and Long-Lived Assets
Revenues:									6,221	1,604	2,232
Other
Revenues from External Customers and Long-Lived Assets
Revenues:									$ 2,768	$ 5,997	$ 4,919