Lease Commitments - Lease Commitments (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Leases [Abstract]
Lease expenses associated with operating leases	$ 3,000,000	$ 2,200,000	$ 1,700,000
2014	1,954,000
2015	432,000
2016	346,000
2017	255,000
2018	151,000
Thereafter	182,000
Total obligations	$ 3,320,000