Income Taxes - Schedule of Reconciliation of Effective Income Tax Rate (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	$ 9,008	$ 15,368	$ (184)
U.S. state and local income taxes, net of U.S. federal income tax benefits	2,033	2,131	(1,585)
Unrecognized tax benefit	6	1,244	1,524
Tax exempt income, net of interest expense	(528)	(715)	(561)
Non-deductible regulatory settlements	5,298	0	306
Business promotion and other non-deductible expenses	655	660	545
Insurance proceeds, non-taxable	(65)	(597)	(349)
Adjustment to reflect prior year tax return filings	256	(251)	(294)
Tax rate change on deferred income taxes	241	208	390
Non-U.S. operations	(447)	185	678
Other	(282)	(477)	(146)
Total	$ 16,175	$ 17,756	$ 324
U.S. federal statutory income tax rate, percent	35.00%	35.00%	35.00%
U.S. state and local income taxes, net of U.S. federal income tax benefits, percent	7.90%	4.90%
Unrecognized tax benefits, percent	0.00%	2.80%
Tax exempt income, net of interest expense, percent	(2.00%)	(1.60%)
Non-deductible regulatory settlements, percent	20.60%	0.00%
Business promotion and other non-deductible expenses, percent	2.50%	1.50%
Insurance proceeds, non-taxable, percent	(0.30%)	(1.40%)
Adjustment to reflect prior year tax return filings, percent	1.00%	(0.60%)
Tax rate change on deferred income taxes, percent	0.90%	0.50%
Non-U.S. operations, percent	(1.70%)	0.40%
Other, percent	(1.10%)	(1.10%)
Total income tax expense, percent	62.80%	40.40%