Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring [Abstract]
Restructuring accrual of severance and related benefits	$ 400	$ 1,500
Restructuring obligation payment	200
Activity in restructuring accrual [Roll Forward]
Balance at beginning of period	0	813
Additions, net	358	1,477
Payments	(146)	(854)
Balance at end of period	212	1,436
Severance and Related Benefits [Member]
Activity in restructuring accrual [Roll Forward]
Balance at beginning of period	0	813
Additions, net	358	1,477
Payments	(146)	(854)
Balance at end of period	212	1,436
Other Exit Costs [Member]
Activity in restructuring accrual [Roll Forward]
Balance at beginning of period	0	0
Additions, net	0	0
Payments	0	0
Balance at end of period	0	0
Contract Termination Costs [Member]
Activity in restructuring accrual [Roll Forward]
Balance at beginning of period	0	0
Additions, net	0	0
Payments	0	0
Balance at end of period	$ 0	$ 0