Operating Segments and Related Information (by Country) (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
Segment Reporting Information [Line Items]
Revenue	$ 41,322	$ 42,988	$ 41,981	$ 37,901	$ 46,507	$ 53,403	$ 50,205	$ 45,101	$ 164,192	$ 195,216	$ 208,503
Long-lived assets	35,167				41,754				35,167	41,754
United States [Member]
Segment Reporting Information [Line Items]
Revenue									91,499	115,819	124,302
Long-lived assets	29,392				33,686				29,392	33,686
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenue									23,817	24,639	30,437
Long-lived assets	4,416				6,690				4,416	6,690
Canada [Member]
Segment Reporting Information [Line Items]
Revenue									15,851	19,584	17,007
France [Member]
Segment Reporting Information [Line Items]
Revenue									8,508	10,225	11,330
Australia [Member]
Segment Reporting Information [Line Items]
Revenue									5,762	4,461	2,467
Mexico [Member]
Segment Reporting Information [Line Items]
Revenue									4,653	4,482	4,877
Brazil [Member]
Segment Reporting Information [Line Items]
Revenue									3,050	5,090	5,919
New Zealand [Member]
Segment Reporting Information [Line Items]
Revenue									1,353	976	984
Spain [Member]
Segment Reporting Information [Line Items]
Revenue									1,275	844	1,252
Thailand [Member]
Segment Reporting Information [Line Items]
Revenue									986	971	896
Hong Kong [Member]
Segment Reporting Information [Line Items]
Revenue									903	851	743
Colombia [Member]
Segment Reporting Information [Line Items]
Revenue									841	752	715
Other [Member]
Segment Reporting Information [Line Items]
Revenue									5,694	6,522	7,574
Long-lived assets	$ 1,359				$ 1,378				$ 1,359	$ 1,378