Other Assets and Liabilities - Schedule of Other Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Long-Term Assets:
Investment in deferred compensation	$ 4,776	$ 5,440
Long-term prepaid assets	34,307	26,291
Long-term income tax asset	3,423	3,412
Other	2,703	2,205
Total other long-term assets	45,209	37,348
Other Long-Term Liabilities:
Accrued pension obligation	40,165	48,412
Deferred rent	22,561	18,948
Deferred directors compensation	4,786	5,453
Long-term swap liability	205	469
Long-term income tax liability	3,999	3,832
Long-term merger expenses	1,812	12,965
Long-term workers compensation liability	9,517	8,039
Other	1,602	3,370
Total other long-term liabilities	$ 84,647	$ 101,488