Goodwill and Other Intangible Assets - Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 131,320	$ 58,053
Additions	3,268	69,398
Goodwill adjustments	1,564	3,869
Goodwill, end of period	$ 136,152	$ 131,320